UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                    FORM 10-Q


[X] Quarterly Report Pursuant to Section 13 or 15(d) of the Securities  Exchange
Act of 1934

For the quarterly period ended March 31, 2002

                                       or

[ ] Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange
Act of 1934

For the transition period from               to
                               -------------    --------------

Commission File Number 1-10709
                       -------

                             PS BUSINESS PARKS, INC.
                             -----------------------
             (Exact name of registrant as specified in its charter)


         California                                              95-4300881
- ----------------------------                              ----------------------
(State or Other Jurisdiction                                 (I.R.S. Employer
      of Incorporation)                                   Identification Number)


               701 Western Avenue, Glendale, California 91201-2397
               ---------------------------------------------------
               (Address of principal executive offices) (Zip Code)


       Registrant's telephone number, including area code: (818) 244-8080
                                                           --------------







Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports) and (2) has been subject to such filing
requirements for the past 90 days.


                                 Yes X    No
                                    ---     ---

Number of shares outstanding of each of the issuer's classes of common stock, as
of May 1, 2002:

Common Stock, $0.01 par value, 21,549,449 shares outstanding



                             PS BUSINESS PARKS, INC.

                                      INDEX





                                                                                                         Page
PART I.  FINANCIAL INFORMATION

                                                                                                       
   Item 1.  Financial Statements

     Condensed   Consolidated   Balance   Sheets  as  of  March  31,  2002  and   December  31,
     2001........................................................................................          2

     Condensed Consolidated  Statements of Income for the Three Months Ended March 31, 2002 and
     2001........................................................................                          3

     Condensed Consolidated Statement of Shareholders' Equity for the Three Months Ended March
     31, 2002....................................................................................          4

     Condensed Consolidated  Statements of Cash Flows for the Three Months Ended March 31, 2002
     and 2001........................................................................                      5

     Notes to Condensed Consolidated Financial Statements........................................          7

   Item 2.  Management's  Discussion  and  Analysis  of  Financial  Condition  and  Results  of
   Operations....................................................................................         21

   Item 3.  Quantitative and Qualitative Disclosures about Market Risk...........................         34


PART II.  OTHER INFORMATION

   Item 1.  Legal Proceedings....................................................................         35

   Item 6.  Exhibits and Reports on Form 8-K.....................................................         36


                                       1



                             PS BUSINESS PARKS, INC.
                      CONDENSED CONSOLIDATED BALANCE SHEETS



                                                                                     March 31,             December 31,
                                                                                       2002                    2001
                                                                                 ----------------        ----------------
                                                                                   (unaudited)
                                     ASSETS
                                     ------

                                                                                                   
Cash and cash equivalents.......................................                 $    84,098,000         $     3,076,000
Marketable securities..........................................                        5,865,000               9,134,000

Real estate facilities, at cost:
     Land......................................................                      288,792,000             288,792,000
     Buildings and equipment...................................                      956,861,000             948,899,000
                                                                                 ----------------        ----------------
                                                                                   1,245,653,000           1,237,691,000
     Accumulated depreciation..................................                     (135,511,000)           (121,609,000)
                                                                                 ----------------        ----------------
                                                                                   1,110,142,000           1,116,082,000
Property held for disposition, net.............................                        9,564,000               9,498,000
Land held for development......................................                       10,644,000              10,629,000
                                                                                 ----------------        ----------------
                                                                                   1,130,350,000           1,136,209,000

Investment in joint venture....................................                        1,111,000                 974,000
Rent receivable................................................                          945,000                 745,000
Interest receivable............................................                          219,000                 137,000
Note receivable................................................                          200,000               7,450,000
Deferred rent receivables......................................                       10,561,000               9,601,000
Intangible assets, net.........................................                          604,000                 679,000
Other assets...................................................                        2,327,000               1,950,000
                                                                                 ----------------        ----------------
              Total assets.....................................                  $ 1,236,280,000         $ 1,169,955,000
                                                                                 ================        ================

                      LIABILITIES AND SHAREHOLDERS' EQUITY
                      ------------------------------------

Accrued and other liabilities.....................................               $    40,833,000         $    39,822,000
Deferred gain on property disposition.............................                             -               5,366,000
Line of credit....................................................                   100,000,000             100,000,000
Unsecured note payable............................................                    50,000,000                       -
Note payable to affiliate.........................................                             -              35,000,000
Mortgage notes payable............................................                    28,140,000              30,145,000
                                                                                 ----------------        ----------------
         Total liabilities........................................                   218,973,000             210,333,000

Minority interest:
         Preferred units..........................................                   197,750,000             197,750,000
         Common units.............................................                   164,085,000             162,141,000

Shareholders' equity:
   Preferred stock, $0.01 par value, 50,000,000 shares authorized, 6,840 shares
     issued and outstanding at March 31, 2002 (4,840
     shares issued and outstanding at December 31, 2001).............                171,000,000             121,000,000
   Common  stock,  $0.01  par  value,  100,000,000  shares  authorized,
     21,549,449  shares  issued  and  outstanding  at  March  31,  2002
     (21,539,783 shares issued and outstanding at December 31, 2001)                     215,000                 215,000
   Paid-in capital................................................                   421,083,000             422,161,000
   Cumulative net income..........................................                   191,562,000             174,860,000
   Comprehensive gain.............................................                        90,000                 108,000
   Cumulative distributions.......................................                  (128,478,000)           (118,613,000)
                                                                                 ----------------        ----------------
         Total shareholders' equity...............................                   655,472,000             599,731,000
                                                                                 ----------------        ----------------
              Total liabilities and shareholders' equity..........               $ 1,236,280,000         $ 1,169,955,000
                                                                                 ================        ================


                             See accompanying notes.
                                        2



                             PS BUSINESS PARKS, INC.
                   CONDENSED CONSOLIDATED STATEMENTS OF INCOME
                                   (Unaudited)



                                                                 For the Three Months
                                                                    Ended March 31,
                                                          -----------------------------------
                                                                2002                2001
                                                          ---------------     ---------------
Revenues:
                                                                        
   Rental income.................................         $   50,344,000      $   38,393,000
   Facility management fees primarily from affiliates            195,000         161,000
   Business services.............................                 41,000             157,000
   Equity in income of joint venture.............                 42,000                   -
   Interest and other income.....................                245,000             764,000
                                                          ---------------     ---------------
                                                              50,867,000          39,475,000
Expenses:
  Cost of operations.............................             13,826,000          10,371,000
  Cost of facility management....................                 45,000              36,000
  Cost of business services......................                176,000             184,000
  Depreciation and amortization..................             13,978,000           9,646,000
  General and administrative.....................              1,136,000           1,128,000
   Interest expense..............................              1,551,000             237,000
                                                          ---------------     ---------------
                                                              30,712,000          21,602,000
                                                          ---------------     ---------------
Income before gain on disposal of real estate, gain
on investments and minority interest.............             20,155,000          17,873,000
  Gain on disposition of real estate.............              5,366,000                   -
  Gain on investment in marketable securities....                 25,000              15,000
                                                          ---------------     ---------------
Income before minority interest..................             25,546,000          17,888,000

  Minority interest in income - preferred units..             (4,412,000)         (3,187,000)
  Minority interest in income - common units.....             (4,432,000)         (3,236,000)
                                                          ---------------     ---------------
Net income.......................................         $   16,702,000      $   11,465,000

Net income allocation:
  Allocable to preferred shareholders............         $    3,617,000      $    1,272,000
  Allocable to common shareholders...............             13,085,000          10,193,000
                                                          ---------------     ---------------
                                                          $   16,702,000      $   11,465,000
                                                          ===============     ===============

Net income per common share:
  Basic..........................................         $        0.61       $        0.44
                                                          ===============     ===============
  Diluted........................................         $        0.60       $        0.44
                                                          ===============     ===============

Weighted average common shares outstanding:
  Basic..........................................             21,543,000          23,021,000
                                                          ===============     ===============
  Diluted........................................             21,736,000          23,097,000
                                                          ===============     ===============

                             See accompanying notes.
                                        3



                             PS BUSINESS PARKS, INC.
            CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY
                    FOR THE THREE MONTHS ENDED MARCH 31, 2002
                                   (Unaudited)



                                                            Preferred Stock                Common Stock              Paid-in
                                                         -----------------------     -------------------------   --------------
                                                          Shares       Amount          Shares        Amount          Capital
                                                         -------- --------------     ----------   ------------   --------------
                                                                                                  
     Balances at December 31, 2001............             4,840  $ 121,000,000      21,539,783   $    215,000   $ 422,161,000

       Issuance of preferred stock............             2,000     50,000,000               -              -      (1,674,000)
       Exercise of stock options..............                 -              -           9,666              -         226,000
        Unrealized loss - depreciation in
          marketable securities...............                 -              -               -              -               -
                                                               -
        Net income............................                 -              -               -              -               -
        Distributions paid:
            Preferred stock...................                 -              -               -              -               -
            Common stock......................                 -              -               -              -               -
        Adjustment  to reflect  minority  interest
          to underlying ownership interest.......              -              -               -              -         370,000
                                                         -------- --------------     ----------   ------------   --------------
     Balances at March 31, 2002...............             6,840  $ 171,000,000      21,549,449   $    215,000   $  421,083,000
                                                         ======== ==============     ==========   ============   ==============


                                                                             Other
                                                        Cumulative       Comprehensive         Cumulative        Shareholders'
                                                        Net Income            Loss           Distributions          Equity
                                                      --------------   ---------------     -----------------    ---------------

     Balances at December 31, 2001............         $174,860,000     $    108,000        $ (118,613,000)      $599,731,000

       Issuance of preferred stock............                    -                -                     -         48,326,000
       Exercise of stock options..............                    -                -                     -            226,000
        Unrealized loss - depreciation in
          marketable securities...............                    -          (18,000)                    -            (18,000)
                                                                  -
        Net income............................           16,702,000                -                     -         16,702,000
        Distributions paid:
            Preferred stock...................                    -                -            (3,617,000)        (3,617,000)
            Common stock......................                    -                -            (6,248,000)        (6,248,000)
        Adjustment  to reflect  minority  interest
          to underlying ownership interest.......                 -                -                                  370,000
                                                      --------------   ---------------     -----------------    ---------------
     Balances at March 31, 2002...............         $191,562,000     $     90,000        $ (128,478,000)      $655,472,000
                                                      ==============   ===============     =================    ===============

                            See accompanying notes.
                                       4



                             PS BUSINESS PARKS, INC.
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (Unaudited)



                                                                                    For the Three Months
                                                                                      Ended March 31,
                                                                            --------------------------------------
                                                                                   2002                 2001
                                                                            ----------------      ----------------
Cash flows from operating activities:
                                                                                            
   Net income.......................................................        $    16,702,000       $    11,465,000
   Adjustments  to  reconcile  net  income  to net  cash  provided  by
     operating activities:
       Gain on sale of marketable securities........................                (25,000)              (15,000)
       Gain on disposition of properties............................             (5,366,000)                    -
       Depreciation and amortization expense........................             13,978,000             9,646,000
       Minority interest in income..................................              8,844,000             6,423,000
       Increase in receivables and other assets.....................             (1,713,000)              509,000
       Increase in accrued and other liabilities....................              5,338,000            (3,677,000)
                                                                            ----------------      ----------------
            Total adjustments.......................................             21,056,000            12,886,000
                                                                            ----------------      ----------------

         Net cash provided by operating activities..................             37,758,000            24,351,000
                                                                            ----------------      ----------------

Cash flows from investing activities:
       Investment in marketable securities..........................                      -            (4,799,000)
       Proceeds from liquidation of investments.....................              3,232,000             5,043,000
       Acquisition of real estate facilities........................                      -               (43,000)
       Proceeds from note receivable................................              7,250,000                     -
       Capital improvements to real estate facilities...............             (5,815,000)           (1,893,000)
       Development of real estate facilities........................             (2,228,000)           (2,835,000)
                                                                            ----------------      ----------------

         Net cash provided by (used in) investing activities........              2,439,000            (4,527,000)
                                                                            ----------------      ----------------

Cash flows from financing activities:
       Proceeds from unsecured notes payable........................             50,000,000                     -
       Principal payments on mortgage notes payable.................             (2,005,000)             (202,000)
       Repayment of borrowings from an affiliate....................            (35,000,000)                    -
       Net proceeds from the issuance of preferred stock............             48,326,000                     -
       Redemption of common operating partnership units.............                      -              (808,000)
       Exercise of stock options....................................                226,000             1,234,000
       Repurchase of common stock...................................                      -            (6,550,000)
       Distributions paid to preferred shareholders.................             (3,617,000)           (1,272,000)
       Distributions paid to minority interests - preferred units...             (4,412,000)           (3,187,000)
       Distributions paid to common shareholders....................             (9,479,000)           (6,671,000)
       Distributions paid to minority interests - common units......             (3,214,000)           (2,119,000)
                                                                            ----------------      ----------------
         Net cash provided by (used in) financing activities........             40,825,000           (19,575,000)
                                                                            ----------------      ----------------
Net increase in cash and cash equivalents...........................             81,022,000               249,000

Cash and cash equivalents at the beginning of the period............              3,076,000            49,295,000
                                                                            ----------------      ----------------
Cash and cash equivalents at the end of the period..................        $    84,098,000       $    49,544,000
                                                                            ================      ================

                            See accompanying notes.
                                       5



                             PS BUSINESS PARKS, INC.
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (Unaudited)




                                                                                    For the Three Months
                                                                                      Ended March 31,
                                                                              -----------------------------
                                                                                  2002              2001
                                                                              -----------       -----------

Supplemental schedule of non cash investing and financing
   activities:

Adjustment  to  reflect  minority  interest  to  underlying  ownership
interest:
                                                                                          
        Minority interest-common units................................        $(370,000)        $ 139,000
        Paid-in capital...............................................          370,000          (139,000)

Unrealized gain/loss:
        Marketable securities.........................................           18,000           140,000
        Other comprehensive (loss) income.............................          (18,000)         (140,000)


                            See accompanying notes.
                                       6



                            PS BUSINESS PARKS, INC.
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                 March 31, 2002

1.   Organization and description of business

     PS Business Parks, Inc. ("PSB") was incorporated in the state of California
     in 1990. As of March 31, 2002, PSB owned approximately 75% of the common
     partnership units of PS Business Parks, L.P. (the "Operating Partnership"
     or "OP"). The remaining common partnership units were owned by Public
     Storage, Inc. ("PSI") and its affiliated entities. PSB, as the sole general
     partner of the Operating Partnership, has full, exclusive and complete
     responsibility and discretion in managing and controlling the Operating
     Partnership. PSB and the Operating Partnership are collectively referred to
     as the "Company."

     The Company is a fully-integrated, self-advised and self-managed real
     estate investment trust ("REIT") that acquires, develops, owns and operates
     commercial properties containing commercial and industrial rental space. As
     of March 31, 2002, the Company owned and operated approximately 14.8
     million net rentable square feet of commercial space located in 9 states.
     The Company also managed approximately 1.7 million net rentable square feet
     on behalf of PSI and its affiliated entities, third party owners and a
     joint venture in which the Company held a 25% ownership interest (See Note
     2).

2.   Summary of significant accounting policies

     Basis of presentation

     The accompanying unaudited condensed consolidated financial statements have
     been prepared in accordance with accounting principles generally accepted
     in the United States for interim financial information and with
     instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly,
     they do not include all of the information and footnotes required by
     accounting principles generally accepted in the United States for complete
     financial statements. The preparation of the condensed consolidated
     financial statements in conformity with accounting principles generally
     accepted in the United States requires management to make estimates and
     assumptions that affect the amounts reported in the condensed consolidated
     financial statements and accompanying notes. Actual results could differ
     from estimates. In the opinion of management, all adjustments (consisting
     of normal recurring accruals) necessary for a fair presentation have been
     included. Operating results for the three months ended March 31, 2002 are
     not necessarily indicative of the results that may be expected for the year
     ended December 31, 2002. For further information, refer to the consolidated
     financial statements and footnotes thereto included in the Company's Annual
     Report on Form 10-K for the year ended December 31, 2001.

     The condensed consolidated financial statements include the accounts of PSB
     and the Operating Partnership. All significant intercompany balances and
     transactions have been eliminated in the condensed consolidated financial
     statements.

     Financial instruments

     The methods and assumptions used to estimate the fair value of financial
     instruments is described below. The Company has estimated the fair value of
     financial instruments using available market information and appropriate
     valuation methodologies. Considerable judgement is required in interpreting
     market data to develop estimates of market value. Accordingly, estimated
     fair values are not necessarily indicative of the amounts that could be
     realized in current market exchanges.

                                       7



     The Company considers all highly liquid investments with an original
     maturity of three months or less at the date of purchase to be cash
     equivalents. Due to the short period to maturity of the Company's cash and
     cash equivalents, accounts receivable, other assets and accrued and other
     liabilities, the carrying values as presented on the condensed consolidated
     balance sheets are reasonable estimates of fair value. Based on borrowing
     rates currently available to the Company, the carrying amount of debt
     approximates fair value.

     Financial assets that are exposed to credit risk consist primarily of cash
     and cash equivalents and accounts receivable. Cash and cash equivalents,
     which consist primarily of short-term investments, including commercial
     paper, are only invested in entities with an investment grade rating.
     Accounts receivable are not a significant portion of total assets and are
     comprised of receivables from a large number of customers.

     Marketable securities

     Marketable securities are classified as "available-for-sale" in accordance
     with Statement of Financial Accounting Standards ("SFAS") No. 115,
     Accounting for Certain Investments in Debt and Equity Securities.
     Investments are reflected on the balance sheet at fair market value based
     upon the quoted market price. The unrealized gain of $90,000 is excluded
     from earnings and reported in a separate component of shareholders' equity.
     Dividend income is recognized when earned.

     Real estate facilities

     Real estate facilities are recorded at cost. Costs related to the
     renovation or improvement of the properties are capitalized. Expenditures
     for repairs and maintenance are expensed as incurred. Buildings and
     equipment are depreciated on the straight-line method over the estimated
     useful lives, which are generally 30 and 5 years, respectively.

     Interest cost and property taxes incurred during the period of construction
     of real estate facilities are capitalized. The Company capitalized $144,000
     and $412,000 of interest expense during the three months ended March 31,
     2002 and 2001, respectively.

                                       8



     Investment in joint venture

     In October 2001, the Company formed a joint venture with an unaffiliated
     investor to own and operate an industrial park in the City of Industry
     submarket of Los Angles County. The park, consisting of 294,000 square feet
     of industrial space, was acquired in December 2000 at a cost of
     approximately $14.4 million. The property was contributed to the joint
     venture at its original cost. The partnership is capitalized with equity
     capital consisting of 25% from the Company and 75% from the unaffiliated
     investor in addition to a mortgage note payable. Summarized below is
     financial data for the joint venture as of March 31, 2002.

                                                    For the three months
                                                      and period ended
                                                       March 31, 2002
                                                    --------------------
Total revenues ..................................       $   462,000

Cost of operations ..............................           128,000
Depreciation and amortization ...................            79,000
Interest expense ................................            96,000
Other expenses ..................................             1,000
                                                    --------------------
  Total expenses ................................           304,000
                                                    --------------------
  Net income ....................................       $   158,000
                                                    ====================

- --------------------------------------------------------------------------------

Real estate, net ................................       $14,910,000
Total assets ....................................        15,517,000

Notes payable ...................................         7,015,000
Total liabilities ...............................         9,591,000
Partner's equity ................................         5,927,000

The Company's investment at March 31, 2002 ......       $ 1,111,000


     The joint venture has a variable rate mortgage obligation of $7,015,000,
     which currently bears interest at 5.45% per annum and is due on November 1,
     2005. Under certain conditions, the Company has guaranteed repayment of the
     mortgage. The Company's investment is accounted for under the equity method
     in accordance with APB 18, "Equity Method of Accounting for Investments."
     In accordance with APB 18, the Company's share of the debt is netted
     against its share of the assets in determining the investment in the joint
     venture of $1,111,000 and is not included in the Company's total
     liabilities.

     Intangible assets

     Intangible assets consist of property management contracts for properties
     managed, but not owned, by the Company. The intangible assets are being
     amortized over seven years. Intangible assets are net of accumulated
     amortization of $1,553,000 and $1,477,000 at March 31, 2002 and December
     31, 2001, respectively.

                                       9



     Evaluation of asset impairment

     The Company evaluates its assets used in operations, by identifying
     indicators of impairment and by comparing the sum of the estimated
     undiscounted future cash flows for each asset to the asset's carrying
     amount. When indicators of impairment are present and the sum of the
     undiscounted future cash flows is less than the carrying value of such
     asset, an impairment loss is recorded equal to the difference between the
     asset's current carrying value and its value based on discounting its
     estimated future cash flows. In addition, the Company evaluates its assets
     held for disposition. Assets held for disposition are reported at the lower
     of their carrying amount or fair value, less cost of dispositions. At March
     31, 2002, no such indicators of impairment have been identified.

     Loan from affiliate

     The Company borrowed an aggregate of $35 million from PSI in 2001 and paid
     $78,000 in interest expense in January 2002. The note bore interest at
     3.25% (per annum) and was repaid in January 2002. A portion of the proceeds
     from the Series F preferred stock issuance described in Note 9 was used to
     repay the note in January 2002.

     Revenue and expense recognition

     All leases are classified as operating leases. Rental income is recognized
     on a straight-line basis over the terms of the leases. Reimbursements from
     tenants for real estate taxes and other recoverable operating expenses are
     recognized as revenues in the period the applicable costs are incurred.

     Costs incurred in connection with leasing (primarily tenant improvements
     and leasing commissions) are capitalized and amortized over the lease
     period.

     Property management fees are recognized in the period earned.

     General and administrative expense

     General and administrative expense includes executive compensation, office
     expense, professional fees, state income taxes, cost of acquisition
     personnel and other such administrative items.

     Income taxes

     The Company qualified and intends to continue to qualify as a REIT, as
     defined in Section 856 of the Internal Revenue Code. As a REIT, the Company
     is not subject to federal income tax to the extent that it distributes its
     taxable income to its shareholders. A REIT must distribute at least 90% of
     its taxable income each year. In addition, REIT's are subject to a number
     of organizational and operating requirements. If the Company fails to
     qualify as a REIT in any taxable year, the Company will be subject to
     federal income tax (including any applicable alternative minimum tax) based
     on its taxable income using corporate income tax rates. Even if the Company
     qualifies for taxation as a REIT, the Company may be subject to certain
     state and local taxes on its income and property and to federal income and
     excise taxes on its undistributed taxable income. The Company believes it
     met all organizational and operating requirements to maintain its REIT
     status during 2001 and intends to continue to meet such requirements for
     2002. Accordingly, no provision for income taxes has been made in the
     accompanying financial statements.

                                       10



     Net income per common share

     Per share amounts are computed using the number of weighted average common
     shares outstanding. "Diluted" weighted average common shares outstanding
     includes the dilutive effect of stock options under the treasury stock
     method. "Basic" weighted average common shares outstanding excludes such
     effect. Earnings per share have been calculated as follows:



                                                                     For the Three Months
                                                                         Ended March 31,
                                                                  -------------------------
                                                                      2002          2001
                                                                  ------------  -----------

                                                                          
Net income allocable to common shareholders ...................   $13,085,000   $10,193,000
                                                                  ============  ===========
Weighted average common shares outstanding:

   Basic weighted average common shares outstanding ...........    21,543,000    23,021,000
   Net effect of  dilutive  stock  options - based on  treasury
     stock method using average market price ..................       193,000        76,000
                                                                  ------------  -----------
   Diluted weighted average common shares outstanding .........    21,736,000    23,097,000
                                                                  ============  ===========

Basic earnings per common share ...............................   $      0.61   $      0.44
                                                                  ============  ===========
Diluted earnings per common share .............................   $      0.60   $      0.44
                                                                  ============  ===========


     Reclassifications

     Certain reclassifications have been made to the condensed consolidated
     financial statements for 2001 in order to conform to the 2002 presentation.

                                       11



3.   Real estate facilities

     The activity in real estate facilities for the three months ended March 31,
     2002 is as follows:



                                                                            Accumulated
                                           Land            Buildings        Depreciation          Total
                                      ----------------  ----------------   ----------------  ----------------
                                                                                 
Balances at December 31, 2001......   $   288,792,000   $   948,899,000    $  (121,609,000)  $ 1,116,082,000
Developed projects.................                 -         2,228,000                  -         2,228,000
Capital improvements...............                 -         5,734,000                  -         5,734,000
Depreciation expense...............                 -                 -        (13,902,000)      (13,902,000)
                                      ----------------  ----------------   ----------------  ----------------
Balances at March 31, 2002.........   $   288,792,000   $   956,861,000    $  (135,511,000)  $ 1,110,142,000
                                      ================  ================   ================  ================



     During the three months ended March 31, 2002, the Company incurred
     $2,228,000 in development costs.

     Two properties have been identified as not meeting the Company's ongoing
     investment strategy and have been designated as a properties held for
     disposition at March 31, 2002. These properties are currently being
     marketed and the Company anticipates the net proceeds to approximate book
     value. The following summarizes the condensed results of operations of the
     property held for disposition which is also included in the condensed
     consolidated statements of income:



                                                                          For the Three Months
                                                                            Ended March 31,
                                                             --------------------------------------------
                                                                      2002                     2001
                                                             ------------------        ------------------
                                                                                 
Rental income.............................................   $         534,000         $         560,000
Cost of operations........................................            (413,000)                 (378,000)
                                                             ------------------        ------------------
Net operating income......................................   $         121,000         $         182,000
                                                             ==================        ==================


4.   Leasing activity

     The Company leases space in its real estate facilities to tenants under
     non-cancelable leases generally ranging from one to ten years. Future
     minimum rental revenues excluding recovery of expenses as of March 31, 2002
     under these leases are as follows:

       2002 (April - December).............         $  123,459,000
       2003................................            140,695,000
       2004................................            107,704,000
       2005................................             76,930,000
       2006................................             46,198,000
       Thereafter..........................             72,414,000
                                                    ---------------
                                                    $  567,400,000
                                                    ===============

                                     12



     In addition to minimum rental payments, tenants pay reimbursements for
     their pro rata share of specified operating expenses, which amounted to
     $6,704,000 and $4,790,000 for the three months ended March 31, 2002 and
     2001, respectively. These amounts are included as rental income and cost of
     operations in the accompanying condensed consolidated statements of income.

5.   Bank Loans

     In September 2000, the Company extended its unsecured line of credit (the
     "Credit Facility") with Wells Fargo Bank. The Credit Facility has a
     borrowing limit of $100 million and an expiration date of August 6, 2003.
     The expiration date may be extended by one year on each anniversary of the
     Credit Facility upon request by the Company and approval by Wells Fargo
     Bank. Interest on outstanding borrowings is payable monthly. At the option
     of the Company, the rate of interest charged is equal to (i) the prime rate
     or (ii) a rate ranging from the London Interbank Offered Rate ("LIBOR")
     plus 0.75% to LIBOR plus 1.35% depending on the Company's credit ratings
     and coverage ratios, as defined (currently LIBOR plus 1.00%). In addition,
     the Company is required to pay an annual commitment fee of 0.25% of the
     borrowing limit. The Company had drawn $100 million on its line of credit
     at March 31, 2002 and December 31, 2001.

     The Credit Facility requires the Company to meet certain covenants
     including (i) maintain a balance sheet leverage ratio (as defined) of less
     than 0.50 to 1.00, (ii) maintain interest and fixed charge coverage ratios
     (as defined) of not less than 2.25 to 1.00 and 1.75 to 1.00, respectively,
     (iii) maintain a minimum total shareholders' equity (as defined) and (iv)
     limit distributions to 95% of funds from operations (as defined). In
     addition, the Company is limited in its ability to incur additional
     borrowings (the Company is required to maintain unencumbered assets with an
     aggregate book value equal to or greater than two times the Company's
     unsecured recourse debt) or sell assets. The Company was in compliance with
     the covenants of the Credit Facility at March 31, 2002.

     In February 2002, the Company entered into a seven year $50 million
     unsecured term note agreement with Fleet National Bank. The note bears
     interest at LIBOR plus 1.45% and is due on February 20, 2009. The Company
     paid a one-time facility fee of 0.35% or $175,000 for the loan. The Company
     expects to use the proceeds from the loan to reduce the amount drawn on the
     Credit Facility.

     The unsecured note requires the Company to meet covenants that are
     substantially the same as the covenants in its credit facility.

                                       13



6.   Mortgage notes payable



     Mortgage notes consist of the following:                                    March 31,         December 31,
                                                                                   2002                2001
                                                                              ---------------    ---------------
                                                                                           
     7.050% mortgage note,  principal and interest  payable  monthly,  due
          May 2006......................................................      $    8,323,000     $    8,374,000
     8.190% mortgage note,  principal and interest  payable  monthly,  due
          March 2007....................................................           6,231,000          6,283,000
     7.290% mortgage note,  principal and interest  payable  monthly,  due
          February 2009.................................................           6,136,000          6,164,000
     7.280% mortgage note,  principal and interest  payable  monthly,  due
          February 2003.................................................           4,025,000          4,059,000
     8.000% mortgage note,  principal and interest  payable  monthly,  due
          April 2003....................................................           1,906,000          1,930,000
     8.500% mortgage note,  principal and interest  payable  monthly,  due
          July 2007.....................................................                   -          1,797,000
     8.000% mortgage note,  principal and interest  payable  monthly,  due
          April 2003....................................................           1,519,000          1,538,000
                                                                              ---------------    ---------------
                                                                                 $28,140,000        $30,145,000
                                                                              ===============    ===============


     At March 31, 2002, approximate principal maturities of mortgage notes
     payable are as follows:

             2002 (March - December).............         $      637,000
             2003................................              7,811,000
             2004................................                630,000
             2005................................                680,000
             2006................................              7,890,000
             Thereafter..........................             10,492,000
                                                          --------------
                                                          $   28,140,000
                                                          ==============

                                       14



7.   Minority interests

     Common partnership units

     The Company presents the accounts of PSB and the Operating Partnership on a
     consolidated basis. Ownership interests in the Operating Partnership, other
     than PSB's interest, are classified as minority interest in the
     consolidated financial statements. Minority interest in income consists of
     the minority interests' share of the consolidated operating results.

     Beginning one year from the date of admission as a limited partner and
     subject to certain limitations described below, each limited partner other
     than PSB has the right to require the redemption of its partnership
     interest.

     A limited partner that exercises its redemption right will receive cash
     from the Operating Partnership in an amount equal to the market value (as
     defined in the Operating Partnership Agreement) of the partnership
     interests redeemed. In lieu of the Operating Partnership redeeming the
     partner for cash, PSB, as general partner, has the right to elect to
     acquire the partnership interest directly from a limited partner exercising
     its redemption right, in exchange for cash in the amount specified above or
     by issuance of one share of PSB common stock for each unit of limited
     partnership interest redeemed.

     A limited partner cannot exercise its redemption right if delivery of
     shares of PSB common stock would be prohibited under the applicable
     articles of incorporation, if the general partner believes that there is a
     risk that delivery of shares of common stock would cause the general
     partner to no longer qualify as a REIT, would cause a violation of the
     applicable securities laws, or would result in the Operating Partnership no
     longer being treated as a partnership for federal income tax purposes.

     On January 12, 2001, the Company redeemed 30,484 common units from
     unaffiliated third parties for an aggregate cost of $808,000 in cash.

     At March 31, 2002, there were 7,305,355 common units owned by PSI and
     affiliated entities and which are accounted for as minority interests. On a
     fully converted basis, assuming all 7,305,355 minority interest common
     units were converted into shares of common stock of PSB at March 31, 2002,
     the minority interest units would convert into approximately 25% of the
     common shares outstanding. At the end of each reporting period, the Company
     determines the amount of equity (book value of net assets) which is
     allocable to the minority interest based upon the ownership interest and an
     adjustment is made to the minority interest, with a corresponding
     adjustment to paid-in capital, to reflect the minority interests' equity in
     the Company.

     Preferred partnership units

     On April 23, 1999, the Operating Partnership completed a private placement
     of 510,000 preferred units with a preferred distribution rate of 8 7/8%.
     The net proceeds from the placement of preferred units were approximately
     $12.5 million and were used to repay borrowings from PSI.

     On September 3, 1999, the Operating Partnership completed a private
     placement of 3,200,000 preferred units with a preferred distribution rate
     of 8 3/4%. The net proceeds from the placement of preferred units were
     approximately $78 million and part of the proceeds was used to prepay a
     mortgage note payable of approximately $8.5 million.

                                       15



     On September 7 and 23, 1999, the Operating Partnership completed private
     placements of 1,200,000 and 400,000 preferred units, respectively, with a
     preferred distribution rate of 8 7/8%. The net proceeds from the placements
     of preferred units were approximately $39.2 million and were used for
     investment in real estate.

     On July 12, 2000, the Operating Partnership completed a private placement
     of 480,000 preferred units with a preferred distribution rate of 8 7/8%.
     The net proceeds from the placement of preferred units were approximately
     $11.7 million and were used for investment in real estate

     On September 21, 2001, the Operating Partnership completed a private
     placement of 2,120,000 preferred units with a preferred distribution rate
     of 9 1/4%. The net proceeds from the placement of preferred units were
     approximately $51.6 million and were used for investment in real estate.

     The Operating Partnership has the right to redeem preferred units on or
     after the fifth anniversary of the applicable issuance date at the original
     capital contribution plus the cumulative priority return, as defined, to
     the redemption date to the extent not previously distributed. The preferred
     units are exchangeable for Cumulative Redeemable Preferred Stock of the
     respective series of PS Business Parks, Inc. on or after the tenth
     anniversary of the date of issuance at the option of the Operating
     Partnership or a majority of the holders of the respective preferred units.
     The Cumulative Redeemable Preferred Stock will have the same distribution
     rate and par value as the corresponding preferred units and will otherwise
     have equivalent terms to the other series of preferred stock described in
     Note 9.

8.   Property management contracts

     The Operating Partnership manages industrial, office and retail facilities
     for PSI and affiliated entities. These facilities, all located in the
     United States, operate under the "Public Storage" or "PS Business Parks"
     names. In addition, the Operating Partnership manages properties for third
     party owners and a joint venture.

     The property management contracts provide for compensation of a percentage
     of the gross revenues of the facilities managed. Under the supervision of
     the property owners, the Operating Partnership coordinates rental policies,
     rent collections, marketing activities, the purchase of equipment and
     supplies, maintenance activities, and the selection and engagement of
     vendors, suppliers and independent contractors. In addition, the Operating
     Partnership assists and advises the property owners in establishing
     policies for the hire, discharge and supervision of employees for the
     operation of these facilities, including property managers and leasing,
     billing and maintenance personnel.

     The property management contract with PSI is for a seven year term with the
     term being extended one year on each anniversary. The property management
     contracts with affiliates of PSI are cancelable by either party upon sixty
     days notice.

                                       16



9.   Shareholders' equity

     Preferred stock

     As of March 31, 2002 and December 31, 2001, the Company had the following
     series of preferred stock outstanding:



                                                   March 31, 2002                        December 31, 2001
                                        -------------------------------------- --------------------------------------
                                                                                     Shares
         Series        Dividend Rate     Shares Outstanding   Carrying Amount     Outstanding       Carrying Amount
     --------------- ------------------ ------------------- ------------------ ------------------ -------------------
                                                                                    
        Series A          9.250%                 2,200       $   55,000,000             2,200      $   55,000,000
        Series D          9.500%                 2,640       $   66,000,000             2,640      $   66,000,000
        Series F          8.750%                 2,000           50,000,000                 -                   -
                                        ------------------- ------------------ ------------------ -------------------
                                                 6,840       $  171,000,000             4,840      $  121,000,000
                                        =================== ================== ================== ===================


     On April 30, 1999, the Company issued 2,200,000 depositary shares, each
     representing 1/1,000 of a share of 9 1/4% Cumulative Preferred Stock,
     Series A. Net proceeds from the public perpetual preferred stock offering
     were approximately $53.1 million and were used to repay borrowings from PSI
     and a mortgage note payable of approximately $11 million. The remaining
     proceeds were used for investment in real estate.

     On May 10, 2001, the Company issued 1,840,000 depositary shares, each
     representing 1/1,000 of a share of 9 1/2% Cumulative Preferred Stock,
     Series D in a public offering. On June 18, 2001, the Company issued 800,000
     depositary shares, each representing 1/1,000 of a share of 9 1/2%
     Cumulative Preferred Stock, Series D in a directed placement. Net proceeds
     from the offerings were approximately $64.3 million and were used for
     investment in real estate and general corporate purposes.

     On January 28, 2002, the Company issued 2,000,000 depositary shares, each
     representing 1/1,000 of a share of 8 3/4% Cumulative Preferred Stock,
     Series F. Net proceeds from the public perpetual preferred stock offering
     were approximately $48.3 million and were used to repay borrowings from PSI
     and general corporate purposes.

     Holders of the Company's preferred stock will not be entitled to vote on
     most matters, except under certain conditions. In the event of a cumulative
     arrearage equal to six quarterly dividends, the holders of the preferred
     stock will have the right to elect two additional members to serve on the
     Company's Board of Directors until all events of default have been cured.
     At March 31, 2002, there were no dividends in arrears.

     Except under certain conditions relating to the Company's qualification as
     a REIT, the preferred stock is not redeemable prior to the following dates:
     Series A - April 30, 2004, Series D - May 10, 2006 and Series F - January
     28, 2007. On or after the respective dates, the respective series of
     preferred stock will be redeemable, at the option of the Company, in whole
     or in part, at $25 per depositary share, plus any accrued and unpaid
     dividends.

     The Company paid $3,617,000 and $1,272,000 in distributions to its
     preferred shareholders for the three months ended March 31, 2002 and 2001,
     respectively.

                                       17



     Common Stock

     The Company's Board of Directors has authorized the repurchase from time to
     time of up to 4,500,000 shares of the Company's common stock on the open
     market or in privately negotiated transactions. For the three months ended
     March 31, 2002, the Company has not repurchased any common stock. Since the
     inception of the program (March 2000), the Company has repurchased an
     aggregate total of 2,321,711 shares of common stock at an aggregate cost of
     approximately $60.5 million (average cost of $26.06 per share).

     On March 31, 2000, a holder of common units in the Operating Partnership
     exercised its option and converted its 107,517 common units into an equal
     number of shares of PSB common stock. The conversion resulted in an
     increase in shareholders' equity and a corresponding decrease in minority
     interest of approximately $2,531,000, representing the book value of the
     common units at the time of conversion.

     The Company paid $6,248,000 ($0.29 per common share) and $6,671,000 ($0.29
     per common share) in distributions to its common shareholders for the three
     months ended March 31, 2002 and 2001, respectively. Pursuant to
     restrictions imposed by the Credit Facility, distributions may not exceed
     95% of funds from operations, as defined.

     Equity stock

     In addition to common and preferred stock, the Company is authorized to
     issue 100,000,000 shares of Equity Stock. The Articles of Incorporation
     provide that the Equity Stock may be issued from time to time in one or
     more series and give the Board of Directors broad authority to fix the
     dividend and distribution rights, conversion and voting rights, redemption
     provisions and liquidation rights of each series of Equity Stock.

10.  Recent accounting pronouncements

     In October 2001, the Financial Accounting Standards Board issued SFAS No.
     144, "Accounting for the Impairment or Disposal of Long-Lived Assets." This
     statement addresses financial accounting and reporting for the disposal of
     long-lived assets and becomes effective for financial statements issued for
     fiscal years beginning after December 15, 2001. The Company is studying
     this statement to determine its effect on the consolidated financial
     statements and will adopt this statement in the year ending December 31,
     2002.

11.  Commitments and contingencies

     Substantially all of the Company's properties have been subjected to Phase
     I environmental reviews. Such reviews have not revealed, nor is management
     aware of, any probable or reasonably possible environmental costs that
     management believes would have a material adverse effect on the Company's
     business, assets or results of operations, nor is the Company aware of any
     potentially material environmental liability, except as discussed below.

      The Company acquired a property in Beaverton, Oregon ("Creekside Corporate
     Park") in May 1998. A portion of Creekside Corporate Park, as well as
     properties adjacent to Creekside Corporate Park, are currently the subject
     of an environmental investigation that is being conducted by two current
     and past owner/operators of an industrial facility on adjacent property,
     pursuant to an Order on Consent issued by the Oregon Department of
     Environmental Quality ("ODEQ"). Results to date indicate that the
     contamination from the industrial facility has migrated onto portions of
     Creekside Corporate Park owned by the Company. There is no evidence that
     the Company's past or current use of the Creekside Corporate Park property
     contributed in any way to the contamination that is the subject of the
     current investigation, nor has the ODEQ alleged any such contribution.

                                       18



     The Company, which is not a party to the Order on Consent, executed
     separate Access Agreements with the two owner/operators to allow access to
     portions of Creekside Corporate Park to conduct the required sampling and
     testing, and to permit one of the owner/operators subject to the Order on
     Consent to construct, install and operate a groundwater treatment system on
     a portion of Creekside Corporate Park owned by the Company. Operation and
     maintenance of this groundwater treatment system, which is required by the
     Interim Remedial Action Plan approved by ODEQ, is the sole responsibility
     of the owner/operator, and not the Company.

     Based on the remedial investigation/feasibility study, ODEQ has selected a
     final remedy that would include permanent treatment of contaminants in the
     groundwater, including expanded groundwater extraction and treatment on all
     parcels of the former industrial property, including portions of Creekside
     Corporate Park. The estimated cost of this remedy is $2.8 million over a
     30-year time period. ODEQ is in the process of preparing a second Consent
     Order for remedy implementation.

     One of the two owner/operators that will likely be a party to the Consent
     Order for remedy implementation recently filed for Chapter 11 bankruptcy
     protection. It is not clear at this point what impact, if any, this filing
     will have on the implementation of the removal or remedial activities
     ordered by the ODEQ. It is possible that the ODEQ could require the Company
     to participate in the implementation of removal or remedial actions that
     may be required on the Company's property, or to pay a portion of the costs
     to do so. In the event the Company is ultimately deemed responsible for any
     costs relating to this matter, the Company believes that it may have
     recourse against the party from whom the property was purchased. In
     addition, the Company believes it may have recourse against other
     potentially responsible parties, including, but not limited to, one or both
     of the owner/operators of the adjacent industrial facility.

     Although the other environmental investigations conducted to date have not
     revealed any environmental liability that the Company believes would have a
     material adverse effect on the Company's business, assets or results of
     operations, and the Company is not aware of any such liability, it is
     possible that these investigations did not reveal all environmental
     liabilities or that there are material environmental liabilities of which
     the Company is unaware. No assurances can be given that (i) future laws,
     ordinances, or regulations will not impose any material environmental
     liability, or (ii) the current environmental condition of the Company's
     properties has not been, or will not be, affected by tenants and occupants
     of the Company's properties, by the condition of properties in the vicinity
     of the Company's properties, or by third parties unrelated to the Company.

     On November 3, 1999, the Company filed an action titled PS Business Parks,
     Inc. v. Larry Howard et al. (Case No. BC219580) in Los Angeles Superior
     Court seeking damages in excess of $1 million. The complaint alleges that
     Mr. Howard and entities controlled by him engaged in unfair trade
     practices. Some of the Company's claims have been dismissed on summary
     adjudication, and the balance has been referred to the arbitration
     proceedings described below for adjudication. Mr. Howard filed a
     cross-complaint which the Company intends to vigorously contest and which
     is also in the process of being referred to arbitration for adjudication.

     On November 27, 2000, Mary Jayne Howard, a former officer of the Company
     filed a demand for arbitration with the American Arbitration Association
     alleging claims against the Company for breach of contract, gender
     discrimination, marital discrimination, and wrongful termination based on
     public policy. The demand seeks damages of approximately $2 million. The
     Company plans to vigorously contest these claims. The Company has also
     filed in the arbitration a cross-claim against Ms. Howard alleging that she
     breached her fiduciary duties to the Company and committed fraud, among
     other claims, seeking damages in excess of $1 million.

     On February 2, 2000, the Company filed an action against Mary Piper, its
     former Vice President of operations, in Riverside County Superior Court,
     alleging claims for breach of fiduciary duties, fraud and deceit,

                                       19



     constructive fraud, negligent misrepresentation, violation of Section 17000
     of the Business and Professions Code, violation of Section 17200 of the
     Business and Professions Code and culpable negligence. The Company's claims
     arose from Ms. Piper's alleged participation in a plan that resulted in the
     payment of improper kickbacks to Larry Howard, a former vendor of the
     Company and the husband of Mary Jayne Howard, a former officer of the
     Company. Ms. Piper subsequently filed a cross-complaint which the Company
     intends to vigorously contest.

     The Company currently is neither subject to any other material litigation
     nor, to management's knowledge, is any material litigation currently
     threatened against the Company other than routine litigation and
     administrative proceedings arising in the ordinary course of business.
     Management believes that these items will not have a material adverse
     impact on the Company's condensed consolidated financial position or
     results of operations.

                                       20



ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
         RESULTS OF OPERATIONS

         Forward-Looking Statements: Forward-looking statements are made
throughout this Quarterly Report on Form 10-Q. For this purpose, any statements
contained herein that are not statements of historical fact may be deemed to be
forward-looking statements. Without limiting the foregoing, the words
"believes," "anticipates," "plans," expects," "seeks," "estimates," and similar
expressions are intended to identify forward-looking statements. There are a
number of important factors that could cause the results of the Company to
differ materially from those indicated by such forward-looking statements,
including those detailed under the heading "Item 2A. Risk Factors." In light of
the significant uncertainties inherent in the forward-looking statements
included herein, the inclusion of such information should not be regarded as a
representation by us or any other person that our objectives and plans will be
achieved. Moreover, we assume no obligation to update these forward-looking
statements to reflect actual results, changes in assumptions or changes in other
factors affecting such forward-looking statements.

Overview

         Effect of Economic Conditions on the Company's Operations: During 2001
and continuing into 2002, the Company has been affected by the slowdown in
economic activity in the United States in most of its primary markets. These
effects were exacerbated by the terrorist attacks of September 11, 2001 and the
related aftermath. These effects include a decline in occupancy rates and a
reduction in market rates throughout the portfolio, slower than expected
lease-up of the Company's development properties, lower interest rates on
invested cash and the rise in insurance costs upon the expiration of our
policies expire in March 2002.

         The reduction in occupancies and market rental rates has been the
result of several factors related to general economic conditions. There are more
businesses contracting than expanding, more businesses failing than starting-up
and general uncertainty for businesses, resulting in slower decision-making and
requests for shorter-term leases. There is also more competing vacant space
including substantial amounts of sub-lease space in many of the Company's
markets. Many of the Company's properties have lower vacancy rates than the
average rates for the markets in which they are located; consequently, the
Company may have difficulty in maintaining its occupancy rates as leases expire.
An extended economic slowdown will put additional downward pressure on
occupancies and market rental rates. The economic slowdown and the abundance of
space alternatives available to customers has led to pressure for greater rent
concessions, more generous tenant improvement allowances and higher broker
commissions.

         The Company's two development properties were 46% leased in the
aggregate as of March 31, 2002, but they have not been leased as rapidly as the
Company had anticipated. The development properties consist of a 141,000 square
foot flex development in Northern Virginia that was 60% leased, and a 97,000
square foot development in the Beaverton submarket of Portland, Oregon that was
26% leased.

         Historically, the Company has raised capital prior to identifying
opportunities to deploy the capital. This has generally resulted in some
short-term earnings dilution. Because interest rates on cash investments have
declined 190 basis points over the past twelve months, however, continuing to
employ this strategy would result in a significantly greater dilution to
earnings from holding capital waiting to be deployed. Accordingly, during this
period of low interest rates, the Company has determined that the cost of this
strategy currently outweighs its benefits. As a result, the Company has used its
line of credit and other short-term borrowing sources to provide the capital to
complete acquisitions.

         The Company also incurred a 30% increase in insurance costs when our
current policies expired in 2002 due to the terrorist attacks of September 11,
2001. The Company does not expect the increase to materially impact its results
since insurance expense represents less than 3% of the Company's operating costs

                                       21



and the Company believes that most of the cost can be passed along to the
Company's customers in accordance with the applicable lease agreements.

         Growth of the Company's Operations: During 2001 and continuing into
2002, the Company focused on increasing cash flow from its existing core
portfolio of properties, seeking to expand its presence in existing markets
through strategic acquisitions and developments and strengthening its balance
sheet, primarily through the issuance of preferred stock/units. The Company has
maintained low debt and overall leverage levels, including preferred
stock/units, which give it the flexibility for future growth without the
issuance of additional common stock.

         During the first quarter of 2002, the Company did not complete any
acquisitions or dispositions of properties. The Company plans to continue to
seek to build its presence in existing markets by acquiring high quality
facilities in selected markets. The Company targets properties with below market
rents which offer the Company the ability to achieve economies of scale
resulting in more efficient operations.

         During 2001, the Company added approximately 2.2 million square feet of
space to its portfolio at an aggregate cost of approximately $303 million. These
acquisitions increased the Company's presence in its existing markets. The
Company acquired 658,000 square feet in Northern Virginia for approximately $88
million, 685,000 square feet in Oregon for approximately $88 million and 905,000
square feet in Maryland for approximately $127 million. In addition, the Company
completed development of three properties totaling 339,000 square feet in
Northern Virginia, Portland and Dallas for approximately $28.5 million. The
Company also disposed of a property aggregating 77,000 square feet for
approximately $9 million. The Company also formed a joint venture to own and
operate an industrial park. This park, consisting of 294,000 square feet, was
acquired in December 2000 at a cost of approximately $14.4 million and was
contributed to the joint venture at its original cost for a 25% equity interest
in the joint venture.

Results of Operations

         Results of Operations: Net income for the three months ended March 31,
2002 was $16,702,000 compared to $11,465,000 for the same period in 2001. Net
income allocable to common shareholders (net income less preferred stock
dividends) for the three months ended March 31, 2002 was $13,085,000 compared to
$10,193,000 for the same period in 2001. Net income per common share on a
diluted basis was $0.60 for the three months ended March 31, 2002 compared to
$0.44 for the same period in 2001 (based on weighted average diluted common
shares outstanding of 21,736,000 and 23,097,000 at March 31, 2002 and March 31,
2001, respectively). Net income allocable to common shareholders in the first
quarter of 2002 included recognizing a deferred gain on the disposal of a
property of $5.4 million or $0.19 per common share.

                                       22



         The Company's property operations account for almost all of the net
operating income earned by the Company. The following table presents the
pre-depreciation operating results of the properties:



                                                                       Three Months Ended
                                                                            March 31,
                                                                    -----------------------------
                                                                        2002             2001             Change
                                                                    -----------       -----------        --------
Rental income:
                                                                                                   
"Same Park" facilities (12 million net rentable square feet)        $38,380,000       $37,104,000           3.4%
Other facilities............................................         11,964,000         1,289,000         828.2%
                                                                    -----------       -----------
Total rental income.........................................        $50,344,000       $38,393,000          31.1%
                                                                    ===========       ===========

Cost of operations (excluding depreciation):
"Same Park" facilities......................................        $10,100,000        $9,735,000           3.7%
Other facilities............................................          3,726,000           636,000         485.8%
                                                                    -----------       -----------
Total cost of operations....................................        $13,826,000       $10,371,000          33.3%
                                                                    ===========       ===========

Net operating income (rental income less cost of operations):
"Same Park" facilities......................................        $28,280,000       $27,369,000           3.3%
Other facilities............................................          8,238,000           653,000        1161.6%
                                                                    -----------       -----------
Total net operating income..................................        $36,518,000       $28,022,000          30.3%
                                                                    ===========       ===========


         Rental income and rental income less cost of operations or net
operating income ("NOI") prior to depreciation are summarized for the three
months ended March 31, 2002 by major geographic region below:




                         Square        Percent         Rental         Percent                        Percent
          Region        Footage        of Total        Income         of Total          NOI          of Total
- -------------------    ----------      --------      -----------      --------     ----------        --------
                                                                                     
Southern California     3,177,000        21.4%       $10,640,000        21.1%      $8,016,000          22.0%
Northern California     1,495,000        10.0%         5,262,000        10.4%       4,043,000          11.1%
Southern Texas          1,032,000         7.0%         2,775,000         5.5%       1,539,000           4.2%
Northern Texas          1,951,000        13.2%         5,430,000        10.8%       3,886,000          10.6%
Virginia                2,621,000        17.7%         9,945,000        19.8%       7,057,000          19.3%
Maryland                1,771,000        12.0%         6,824,000        13.6%       4,891,000          13.4%
Oregon                  1,973,000        13.3%         7,640,000        15.2%       6,111,000          16.7%
Other                     797,000         5.4%         1,828,000         3.6%         975,000           2.7%
                       ----------      --------      -----------      --------     ----------        --------
                       14,817,000       100.0%       $50,344,000       100.0%     $36,518,000         100.0%
                       ==========      ========      ===========      ========     ==========        ========



         Supplemental Property Date and Trends: In order to evaluate the
performance of the Company's overall portfolio, management analyzes the
operating performance of a consistent group of properties constituting 12
million net rentable square feet ("Same Park" facilities). The Company currently
has an ownership interest in these properties and has owned and operated them
for the comparable periods. These properties do not include properties that have
been acquired or sold during 2001 and 2002. The "Same Park" facilities represent
approximately 81% of the weighted average square footage of the Company's
portfolio at March 31, 2002.

                                       23



         The following table summarizes the pre-depreciation historical
operating results of the "Same Park" facilities excluding the effects of
accounting for rental income on a straight-line basis.

                "Same Park" Facilities (12.0 million square feet)
                -------------------------------------------------

                                               Three Months Ended
                                                   March 31,
                                       -----------------------------
                                            2002            2001       Change
                                       -------------   -------------   ------
  Rental income (1)..................  $  37,648,000   $  36,746,000    2.5%
  Cost of operations.................     10,100,000       9,735,000    3.7%
                                       -------------   -------------
  Net operating income...............  $  27,548,000   $  27,011,000    2.0%
                                       =============   =============
  Gross margin (2)...................      73.2%           73.5%       (0.3%)

  Weighted average for period:
  ----------------------------

      Occupancy......................      95.2%           96.5%       (1.3%)
      Annualized realized rent per
        occupied sq. ft.(3)..........     $13.14          $12.66        3.8%

(1)  Rental income does not include the effect of straight-line accounting.
(2)  Gross margin is computed by dividing property net operating income by
     rental income.
(3)  Realized rent per square foot represents the actual revenues earned per
     occupied square foot.


         The following tables summarize the "Same Park" operating results by
major geographic region for the three months ended March 31, 2002 and 2001:



                             Revenues        Revenues       Increase            NOI            NOI         Increase
         Region                2002            2001        (Decrease)          2002            2001       (Decrease)
- ------------------------    -----------      ----------    ----------       ----------     ----------     ----------
                                                                                          
Southern California.....    $10,523,000      $9,993,000        5.3%         $7,985,000     $7,474,000       6.8%
Northern California.....      5,071,000       4,524,000       12.1%          3,892,000      3,432,000      13.4%
Southern Texas..........      2,207,000       2,350,000       (6.1%)         1,419,000      1,491,000      (4.8%)
Northern Texas..........      4,786,000       4,706,000        1.7%          3,381,000      3,325,000       1.7%
Virginia................      6,138,000       6,267,000       (2.1%)         4,274,000      4,546,000      (5.9%)
Maryland................      2,330,000       2,468,000       (5.6%)         1,713,000      1,832,000      (6.5%)
Oregon..................      4,786,000       4,536,000        5.5%          3,901,000      3,674,000       6.2%
Other...................      1,807,000       1,902,000       (5.0%)           983,000      1,237,000      (20.5%)
                            -----------      ----------                     ----------     ----------
                            $37,648,000     $36,746,000        2.5%        $27,548,000    $27,011,000        2.0%
                            ===========      ==========                     ==========     ==========


         The increases noted above reflect the performance of the Company's
existing markets. Northern and Southern California and Oregon continue to
benefit from the expirations of leases during 2001 with below market rents. The
decreases reflected above were primarily due to declining occupancy levels and
declining rental rates. Total revenues include rental income that was determined
to be uncollectible and was written-off in the amount of $230,000 and $83,000
for the three months ended March 31, 2002 and 2001, respectively.

                                       24



         Facility Management Operations: The Company's facility management
accounts for a small portion of the Company's net operating income. During the
three months ended March 31, 2002, $150,000 in net operating income was
recognized from facility management operations compared to $125,000 for the same
period in 2001. Facility management fees have increased due to the increase in
rental rates of the properties managed by the Company and an additional property
brought under management during 2001.

         Business Services: Business services include construction management
fees and fees from telecommunications service providers. During the three months
ended March 31, 2002, Business Services generated a net operating loss of
$135,000 compared to net operating loss of $27,000 for the same period in 2001.
Business services revenue have declined due to the bankruptcies of Darwin
Networks, Winstar and Teligent.

         Interest and Other Income: Interest and other income reflects earnings
on cash balances and dividends on marketable securities. Interest income was
$241,000 for the three months ended March 31, 2002 compared to $760,000 for the
same period in 2001. The decrease is attributable to lower average cash balances
and interest rates. Average cash balances and effective interest rates for the
three months ended March 31, 2002 were approximately $23 million and 2.3%
compared to $55 million and 4.2% for the same period in 2001.

         Cost of Operations: Cost of operations for the three months ended March
31, 2002 was $13,826,000 compared to $10,371,000 for the same period in 2001.
The increase is due primarily to the growth in the square footage of the
Company's portfolio of properties. Cost of operations as a percentage of rental
income is fairly consistent at 27.5% in 2002 compared to 27.0% in 2001.

         Depreciation and Amortization Expense: Depreciation and amortization
expense for the three months ended March 31, 2002 was $13,978,000 compared to
$9,646,000 for the same period in 2001. The increase is primarily due to
depreciation expense on real estate facilities acquired or developed during
2001.

         General and Administrative Expense: General and administrative expense
was $1,136,000 for the three months ended March 31, 2002 compared to $1,128,000
for the same period in 2001. Included in general and administrative costs are
acquisition costs and abandoned transaction costs. Acquisition expenses were
$163,000 and $203,000 for the three months ended March 31, 2002 and 2001,
respectively.

         Interest Expense: Interest expense was $1,551,000 for the three months
ended March 31, 2002 compared to $237,000 for the same period in 2001. The
increase is primarily attributable to increased debt balances in 2002 due to the
use of the Company's credit facilities to fund acquisitions completed during the
fourth quarter of 2001. Interest expense of $144,000 and $412,000 was
capitalized as part of building costs associated with properties under
development during the three months ended March 31, 2002 and 2001 respectively.

         Gain on Disposition of Real Estate: Gain on sale of real estate was
$5,366,000 for the three months ended March 31, 2002. The Company disposed of a
property in San Diego for approximately $9 million in November 2001 and deferred
a gain of $5,366,000 which was later recognized in 2002 when the buyer of the
property obtained third party financing for the property and paid off its note
to the Company.

         Gain on Investment in Marketable Securities: Gain on investments in
marketable securities was $25,000 for the three months ended March 31, 2002
compared to $15,000 for the same period in 2001.

         Minority Interest in Income: Minority interest in income reflects the
income allocable to equity interests in the Operating Partnership that are not
owned by the Company. Minority interest in income was $8,844,000 ($4,412,000
allocated to preferred unitholders and $4,432,000 allocated to common
unitholders) for the three months ended March 31, 2002 compared to $6,423,000
($3,187,000 allocated to preferred unitholders and $3,236,000 allocated to
common unitholders) for the same period in 2001. The increase in minority

                                       25



interest in income is due primarily to the issuance of preferred operating
partnership units during 2001 and higher earnings at the Operating Partnership
level.

Liquidity and Capital Resources

         Net cash provided by operating activities for the three months ended
March 31, 2002 and 2001 was $37,801,000 and $24,351,000, respectively.
Management believes that the Company's internally generated net cash provided by
operating activities will continue to be sufficient to enable it to meet its
operating expenses, capital improvements and debt service requirements and to
maintain the current level of distributions to shareholders.

         The following table summarizes the Company's cash flow from operating
activities:



                                                                                 Three Months Ended
                                                                                      March 31,
                                                                           -------------------------------
                                                                               2002              2001
                                                                           -------------     -------------
                                                                                       
Net income..........................................................       $ 16,702,000      $ 11,465,000
Gain on sale of marketable securities...............................            (25,000)          (15,000)
Gain on disposal of properties......................................         (5,366,000)                -
Depreciation and amortization.......................................         13,978,000         9,646,000
Minority interest in income.........................................          8,844,000         6,423,000
Change in working capital...........................................          3,625,000        (3,168,000)
                                                                           -------------     -------------
Net cash provided by operating activities...........................         37,758,000        24,351,000

Maintenance capital expenditures....................................           (842,000)         (573,000)
Tenant improvements.................................................         (2,163,000)         (929,000)
Capitalized lease commissions.......................................           (858,000)         (391,000)
                                                                           -------------     -------------

Funds available for distributions to shareholders, minority interests,
  acquisitions and other corporate purposes.........................         33,895,000        22,458,000

Cash distributions to shareholders and minority interests...........        (20,722,000)      (13,249,000)
                                                                           -------------     -------------

Excess funds available for principal payments on debt, investments in
  real estate and other corporate purposes..........................       $ 13,173,000      $  9,209,000
                                                                           =============     =============


         The Company's capital structure is characterized by a low level of
leverage. As of March 31, 2002, the Company had six fixed rate mortgage notes
payable totaling $28,140,000, which represented 2.4% of its total capitalization
(based on book value, including minority interest and debt). The weighted
average interest rate for the mortgage notes is 7.50%.

         The Company used its short-term borrowing capacity to complete
acquisitions totaling $303 million in 2001. The Company borrowed $100 million
from its line of credit and $35 million from PSI. The remaining balance was
funded from proceeds of the issuance of preferred stock and preferred units in
the operating partnership totaling $116 million and existing cash of $52
million. During January 2002, the Company issued 2,000,000 depositary shares,
each representing 1/1,000 of a share of 8 3/4% Cumulative Preferred Stock,
Series F, resulting in net proceeds of $48.4 million. This was used to repay PSI
and to increase financial flexibility.

         During February 2002, the Company entered into a seven year $50 million
term loan agreement with Fleet National Bank. The note bears interest at LIBOR
plus 1.45% and is due on February 20, 2009. The Company paid a one-time fee of

                                       26



0.35% or $175,000 for the facility. The Company expects to use the proceeds of
the loan to reduce the amount drawn on its line of credit with Wells Fargo Bank.

         When interest rise from their historically low levels, the Company
expects to return to its strategy of funding primarily with permanent capital,
including the issuance of common and preferred stock, and internally generated
retained cash flows and to a lesser extent with secured or unsecured debt. In
addition, the Company may sell properties that no longer meet its investment
criteria. The Company may finance acquisitions on a temporary basis with
borrowings from its Credit Facility. The Company intends to repay amounts
borrowed under the Credit Facility from undistributed cash flow or, as market
conditions permit and as determined to be advantageous, from the public or
private placement of preferred and common stock/OP units of the Company or
Operating Partnership or the formation of joint ventures. The Company targets a
leverage ratio of 40% (defined as debt and preferred equity as a percentage of
market capitalization). In addition, the Company targets a ratio of Funds from
Operations ("FFO") to combined fixed charges and preferred distributions of 3.0
to 1.0. As of March 31, 2002, the leverage ratio was 35% and the FFO to fixed
charges and preferred distributions coverage ratio was 3.6 to 1.0.

         In September 2000, the Company extended its Credit Facility with Wells
Fargo Bank. The Credit Facility has a borrowing limit of $100 million and an
expiration date of August 6, 2003. The expiration date may be extended by one
year on each anniversary of the Credit Facility upon request by the Company and
approval by Wells Fargo Bank. Interest on outstanding borrowings is payable
monthly. At the option of the Company, the rate of interest charged is equal to
(i) the prime rate or (ii) a rate ranging from the London Interbank Offered Rate
("LIBOR") plus 0.75% to LIBOR plus 1.35% depending on the Company's credit
ratings and coverage ratios, as defined (currently LIBOR plus 1.00%). In
addition, the Company is required to pay an annual commitment fee of 0.25% of
the borrowing limit. As of March 31, 2002, the balance was fully utilized at
$100 million.

         Funds from Operations: FFO is defined as net income, computed in
accordance with generally accepted accounting principles ("GAAP"), before
depreciation, amortization, minority interest in income, straight line rent
adjustments and extraordinary or non-recurring items. FFO is presented because
the Company considers FFO to be a useful measure of the operating performance of
a REIT which, together with net income and cash flows provides investors with a
basis to evaluate the operating and cash flow performances of a REIT. FFO does
not represent net income or cash flows from operations as defined by GAAP. FFO
does not take into consideration scheduled principal payments on debt or capital
improvements. The Company believes that in order to facilitate a clear
understanding of the Company's operating results, FFO should be analyzed in
conjunction with net income as presented in the Company's consolidated financial
statements included elsewhere in this Form 10-Q. Accordingly, FFO is not
necessarily a substitute for cash flow or net income as a measure of liquidity
or operating performance or ability to make acquisitions and capital
improvements or ability to make distributions or debt principal payments.

                                       27



         Also, FFO as computed and disclosed by the Company may not be
comparable to FFO computed and disclosed by other REITs. FFO for the Company is
computed as follows:



                                                                                 Three Months Ended
                                                                                      March 31,
                                                                          --------------------------------
                                                                               2002              2001
                                                                          --------------    --------------
                                                                                      
Net income allocable to common shareholders........................       $  13,085,000     $  10,193,000
  Less:  Gain on investment in marketable securities...............             (25,000)          (15,000)
  Less:  Gain on disposition of real estate........................          (5,366,000)                -
  Depreciation and amortization....................................          13,978,000         9,646,000
  Depreciation from joint venture..................................              20,000                 -
  Minority interest in income - common units.......................           4,432,000         3,236,000
  Less:  Straight-line rent adjustment.............................            (960,000)         (370,000)
                                                                          --------------    --------------

Consolidated FFO allocable to common shareholders and minority
interests..........................................................          25,164,000        22,690,000
FFO allocated to common minority interest - common units...........          (6,366,000)       (5,468,000)
                                                                          --------------    --------------

FFO allocated to common shareholders...............................       $  18,798,000     $  17,222,000
                                                                          ==============    ==============


         Capital Expenditures: On a recurring annual basis, the Company expects
to expend between $0.90 and $1.20 per square foot in recurring capital
expenditures ($13-$18 million based on square footage at March 31, 2002). In
addition, the Company expects to make $19 million in additional capital
expenditures in 2002. These investments include improvements to bring acquired
properties up to the Company's standards of $6.6 million, first generation
tenant improvements and leasing commissions on development properties of $7
million and the renovation of properties in Southern California, Northern
Virginia, Arizona and Maryland totaling $5.4 million. During the three months
ended March 31, 2002, the Company incurred approximately $8 million in capital
expenditures. These included $3.9 million in maintenance capital expenditures,
tenant improvements and capitalized leasing commissions, $0.5 million to bring
acquired properties up to the Company's standards, $2.2 million in first
generation tenant improvements and leasing commissions on developed properties
and $1.4 million property renovations.

         Stock Repurchase: The Company's Board of Directors has authorized the
repurchase from time to time of up to 4,500,000 shares of the Company's common
stock on the open market or in privately negotiated transactions. The Company
has not repurchased any common stock in 2002.

         Distributions: The Company has elected and intends to qualify as a REIT
for federal income tax purposes. In order to maintain its status as a REIT, the
Company must meet, among other tests, sources of income, share ownership and
certain asset tests. As a REIT, the Company is not taxed on that portion of its
taxable income that is distributed to its shareholders provided that at least
90% of its taxable income is distributed to its shareholders prior to filing of
its tax return.

         Related Party Transactions: At March 31, 2002, PSI owns 25% of the
outstanding shares of the Company's common stock (44% upon conversion of its
interest in the Operating Partnership) and 25% of the outstanding common units
of the Operating Partnership (100% of the common units not owned by the
Company). Ronald L. Havner, Jr., the Company's Chairman, President and Chief
Executive Officer, is also an employee of PSI. As of December 31, 2001, the
Company had $35 million in short-term borrowings from PSI. The notes bore
interest at 3.25% and were repaid as of January 28, 2002. Finally, the Company
provides property management services for properties owned by PSI and its
affiliates for a fee of 5% of the gross revenues of such properties in addition
to reimbursement of direct costs.

                                       28



ITEM 2A. RISK FACTORS

         In addition to the other information in this Form 10-Q, the following
factors should be considered in evaluating our company and our business.

PSI has significant influence over us.
- --------------------------------------

         PSI owns a substantial number of our shares and of the units of our
operating partnership: At March 31, 2002, PSI and its affiliates owned 25% of
the outstanding shares of our common stock (44% upon conversion of its interest
in our operating partnership) and 25% of the outstanding common units of our
operating partnership (100% of the common units not owned by us). Consequently,
PSI has the ability to significantly influence all matters submitted to a vote
of our shareholders, including electing directors, changing our articles of
incorporation, dissolving and approving other extraordinary transactions such as
mergers, and all matters requiring the consent of the limited partners of the
operating partnership. In addition, PSI's ownership may make it more difficult
for another party to take over our company without PSI's approval.

Provisions in our organizational documents may prevent changes in control.
- --------------------------------------------------------------------------

         Our articles generally prohibit owning more than 7% of our shares: Our
articles of incorporation restrict the number of shares that may be owned by any
person (other than PSI and certain other specified shareholders), and the
partnership agreement of our operating partnership contains an anti-takeover
provision. No shareholder (other than PSI and certain other specified
shareholders) may own more than 7% of the outstanding shares of our common
stock, unless our board of directors waives this limitation. We imposed this
limitation to avoid, to the extent possible, a concentration of ownership that
might jeopardize our ability to qualify as a real estate investment trust, or
REIT. This limitation, however, also makes a change of control much more
difficult even if it may be favorable to our public shareholders. These
provisions will prevent future takeover attempts not approved by PSI even if a
majority of our public shareholders consider it to be in their best interests
because they would receive a premium for their shares over the shares' then
market value or for other reasons.

         Our board can set the terms of certain securities without shareholder
approval: Our board of directors is authorized, without shareholder approval, to
issue up to 50,000,000 shares of preferred stock and up to 100,000,000 shares of
equity stock, in each case in one or more series. Our board has the right to set
the terms of each of these series of stock. Consequently, the board could set
the terms of a series of stock that could make it difficult (if not impossible)
for another party to take over our company even if it might be favorable to our
public shareholders. We can also cause our operating partnership to issue
additional interests for cash or in exchange for property.

         The partnership agreement of our operating partnership restricts
mergers: The partnership agreement of our operating partnership provides that
generally we may not merge or engage in a similar transaction unless limited
partners of our operating partnership are entitled to receive the same
proportionate payments as our shareholders. In addition, we have agreed not to
merge with another entity unless the merger would have been approved had the
limited partners been able to vote together with our shareholders, which has the
effect of increasing PSI's influence over us due to PSI's ownership of operating
partnership units. These provisions may make it more difficult for us to merge
with another entity.

Our operating partnership poses additional risks to us.
- -------------------------------------------------------

         Limited partners of our operating partnership, including PSI, have the
right to vote on certain changes to the partnership agreement. They may vote in
a way that is contrary to the interest of our shareholders. Also, as general
partner of our operating partnership, we are required to protect the interests
of the limited partners of our operating partnership. The interests of the
limited partners and of our shareholders may differ.

                                       29



We cannot sell certain properties without PSI's approval.
- ---------------------------------------------------------

         Before 2007, we may not sell 12 specified properties without PSI's
approval. Since PSI would be taxed on a sale of these properties, the interests
of PSI and our other shareholders may differ as to the best time to sell.

Certain institutional investors have special rights.
- ----------------------------------------------------

         Certain institutional investors have rights, such as the right to
approve nominees to our board of directors, the right to purchase our securities
in certain circumstances and the right to require registration of their shares,
not available to our public shareholders.

We would incur adverse tax consequences if we fail to qualify as a REIT.
- ------------------------------------------------------------------------

         Our cash flow would be reduced if we fail to qualify as a REIT: While
we believe that we have qualified since 1990 to be taxed as a REIT, and will
continue to be qualified, we cannot be certain of doing so. To continue to
qualify as a REIT, we need to satisfy certain requirements under the federal
income tax laws relating to our income, assets, distributions to shareholders
and shareholder base. In this regard, the share ownership limits in our articles
of incorporation do not necessarily ensure that our shareholder base is
sufficiently diverse for us to qualify as a REIT. For any year we fail to
qualify as a REIT, we would be taxed at regular corporate tax rates on our
taxable income unless certain relief provisions apply. Taxes would reduce our
cash available for distributions to shareholders or for reinvestment, which
could adversely affect us and our shareholders. Also we would not be allowed to
elect REIT status for five years after we fail to qualify unless certain relief
provisions apply.

         Our cash flow would be reduced if our predecessor failed to qualify as
a REIT: For us to qualify to be taxed as a REIT, our predecessor, American
Office Park Properties, also needed to qualify to be taxed as a REIT. We believe
American Office Park Properties qualified as a REIT beginning in 1997 until its
March 1998 merger with us. If it is determined that it did not qualify as a
REIT, we could also lose our REIT qualification. Before 1997, our predecessor
was a taxable corporation and, to qualify as a REIT, was required to distribute
all of its cumulative retained profits before the end of 1996. Because a
determination of the precise amount of profits retained by a company over a
sustained period of time is very difficult, there is some risk that not all of
American Office Park Properties' profits were so distributed. While we believe
American Office Park Properties qualified as a REIT since 1997, we did not
obtain an opinion of an outside expert at the time of its merger with us.

         We may need to borrow funds to meet our REIT distribution requirements:
To qualify as a REIT, we must generally distribute to our shareholders 90% of
our taxable income. Our income consists primarily of our share of our operating
partnership's income. We intend to make sufficient distributions to qualify as a
REIT and otherwise avoid corporate tax. However, differences in timing between
income and expenses and the need to make nondeductible expenditures such as
capital improvements and principal payments on debt could force us to borrow
funds to make necessary shareholder distributions.

Since we buy and operate real estate, we are subject to general real estate
- ---------------------------------------------------------------------------
investment and operating risks.
- -------------------------------

         Summary of real estate risks: We own and operate commercial properties
and are subject to the risks of owning real estate generally and commercial
properties in particular. These risks include:

o    the national, state and local economic climate and real estate conditions,
     such as oversupply of or reduced demand for space and changes in market
     rental rates;

o    how prospective tenants perceive the attractiveness, convenience and safety
     of our properties;

o    our ability to provide adequate management, maintenance and insurance;

                                       30



o    our ability to collect rent from tenants on a timely basis;

o    the expense of periodically renovating, repairing and reletting spaces;

o    increasing operating costs, including real estate taxes, insurance and
     utilities, if these increased costs cannot be passed through to tenants;

o    changes in tax, real estate and zoning laws;

o    increase in new developments;

o    tenant bankruptcies;

o    sublease space; and

o    concentration in non-rated private companies.

         Certain significant costs, such as mortgage payments, real estate
taxes, insurance and maintenance costs, generally are not reduced even when a
property's rental income is reduced. In addition, environmental and tax laws,
interest rate levels, the availability of financing and other factors may affect
real estate values and property income. Furthermore, the supply of commercial
space fluctuates with market conditions.

         If our properties do not generate sufficient income to meet operating
expenses, including any debt service, tenant improvements, leasing commissions
and other capital expenditures, we may have to borrow additional amounts to
cover fixed costs, and we may have to reduce our distributions to shareholders.

         During 2001 and 2002, we were affected by the slowdown in economic
activity in the United States in most of its primary markets. These effects were
exacerbated by the terrorist attacks of September 11, 2001 and the related
aftermath. These effects included a decline in occupancy rates and a reduction
in market rates throughout the portfolio, slower than expected lease-up of our
development properties, lower interest rates on invested cash and the
expectation that insurance costs will rise as our policies have expired in March
2002. An extended economic slowdown will put additional downward pressure on
occupancies and market rental rates and may lead to pressure for greater rent
concessions, or generous tenant improvement allowances and higher broker
commissions.

         We may encounter significant delays in reletting vacant space,
resulting in losses of income: When leases expire, we will incur expenses and we
may not be able to release the space on the same terms. Certain leases provide
tenants with the right to terminate early if they pay a fee. Our properties as
of March 31, 2002 generally have lower vacancy rates than the average for the
markets in which they are located, and leases for 32% of our space expire in
2002 or 2003 (leases for 53% of the space occupied by small tenants expire in
such years). While we have estimated our cost of renewing leases that expire in
2002, our estimates could be wrong. If we are unable to release space promptly,
if the terms are significantly less favorable than anticipated or if the costs
are higher, we may have to reduce our distributions to shareholders.

         Tenant defaults and bankruptcies may reduce our cash flow and
distributions: We may have difficulty in collecting from tenants in default,
particularly if they declare bankruptcy. This could reduce our cash flow and
distributions to shareholders.

         We may be adversely affected by significant competition among
commercial properties: Many other commercial properties compete with our
properties for tenants and we expect that new properties will be built in our
markets. Also, we compete with other buyers, many of whom are larger than we
are, in seeking to acquire commercial properties. Therefore, we may not be able
to grow as rapidly as we would like.

                                       31



         We may be adversely affected if casualties to our properties are not
covered by insurance: We carry insurance on our properties that we believe is
comparable to the insurance carried by other operators for similar properties.
However, we could suffer uninsured losses that adversely affect us or even
result in loss of properties. We might still remain liable on any mortgage debt
related to that property.

         The illiquidity of our real estate investments may prevent us from
adjusting our portfolio to respond to market changes: There may be delays and
difficulties in selling real estate. Therefore, we cannot easily change our
portfolio when economic conditions change. Also, tax laws limit a REIT's ability
to sell properties held for less than four years.

         We may be adversely affected by governmental regulation of our
properties: Our properties are subject to various federal, state and local
regulatory requirements, such as state and local fire and safety codes. If we
fail to comply with these requirements, governmental authorities could fine us
or courts could award damages against us. We believe our properties comply with
all significant legal requirements. However, these requirements could change in
a way that would reduce our cash flow and ability to make distributions to
shareholders.

         We may incur significant environmental remediation costs: Under various
federal, state and local environmental laws an owner or operator of real estate
interests may have to clean spills or other releases of hazardous or toxic
substances on or from a property. Certain environmental laws impose liability
whether or not the owner knew of, or was responsible for, the presence of the
hazardous or toxic substances. In some cases, liability may exceed the value of
the property. The presence of toxic substances, or the failure to properly
remedy any resulting contamination, may make it more difficult for the owner or
operators to sell, lease or operate its property or to borrow money using its
property as collateral. Future environmental laws may impose additional material
liabilities on us.

         We acquired a property in Beaverton, Oregon ("Creekside Corporate
Park") in May 1998 that is currently the subject of an environmental
investigation being conducted by two current and past owner/operators of an
industrial facility on adjacent property, pursuant to an Order on Consent
("Order") issued by the Oregon Department of Environmental Quality ("ODEQ").
There is no evidence that our past or current use of the Creekside Corporate
Park property contributed in any way to the contamination that is the subject of
the current investigation, nor has the ODEQ alleged any such contribution, and
we are not a party to the Order.

         Based on the results of the remedial investigation/feasibility study,
ODEQ has selected a final remedy that would include permanent treatment of
contaminants in the groundwater, including expanded groundwater extraction and
treatment on all parcels of the former industrial property, including portions
of Creekside Corporate Park. The estimated cost of this remedy is $2.8 million
over a 30-year time period. In the event we are ultimately deemed responsible
for any costs relating to this matter, we believe that the party from whom the
property was purchased will be responsible for any expenses or liabilities that
we may incur as a result of this contamination. In addition, we believe we may
have recourse against other potentially responsible parties, including, but not
limited to, one or both of the owner/operators of the adjacent industrial
facility. However, if we are deemed responsible for any expenses related to
removal or remedial actions on the property, and we are not successful in
obtaining reimbursement from one or more third parties, our operations and
financial condition could be harmed.

         We may be affected by the Americans with Disabilities Act: The
Americans with Disabilities Act of 1990 requires that access and use by disabled
persons of all public accommodations and commercial properties be facilitated.
Existing commercial properties must be made accessible to disabled persons.
While we have not estimated the cost of complying with this act, we do not
believe the cost will be material.

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Our ability to control our properties may be adversely affected by ownership
- ----------------------------------------------------------------------------
through partnerships and joint ventures.
- ----------------------------------------

         We own most of our properties through our operating partnership. Our
organizational documents do not limit our ability to invest funds with others in
partnerships or joint ventures. During 2001, we entered into a joint venture
arrangement that holds property subject to debt. This type of investment may
present additional risks. For example, our partners may have interests that
differ from ours or that conflict with ours, or our partners may become
bankrupt. In addition, the joint venture may default on its debt, which we have
guaranteed under certain circumstances. We believe this risk is mitigated by the
low level of debt (57% of the cost in the joint venture) and the financial
strength of our joint venture partner.

We can change our business policies and increase our level of debt without
- --------------------------------------------------------------------------
shareholder approval.
- ---------------------

         Our board of directors establishes our investment, financing,
distribution and other business policies and may change these policies without
shareholder approval. Our organizational documents do not limit our level of
debt. A change in our policies or an increase in our level of debt could
adversely affect our operations or the price of our common stock.

We can issue additional securities without shareholder approval.
- ----------------------------------------------------------------

         We can issue preferred and common stock without shareholder approval.
Holders of preferred stock have priority over holders of common stock, and the
issuance of additional shares of common stock reduces the interest of existing
holders in our company.

Increases in interest rates may adversely affect the market price of our common
- -------------------------------------------------------------------------------
stock.
- ------

         One of the factors that influences the market price of our common stock
is the annual rate of distributions that we pay on our common stock, as compared
with interest rates. Interest rates in late 2001 and early 2002 have been at
historically low levels. An increase in interest rates may lead purchasers of
REIT shares to demand higher annual distribution rates, which could adversely
affect the market price of our common stock.

Shares that become available for future sale may adversely affect the market
- ----------------------------------------------------------------------------
price of our common stock.
- --------------------------

         Substantial sales of our common stock, or the perception that
substantial sales may occur, could adversely affect the market price of our
common stock. Certain of our shareholders hold significant numbers of shares of
our common stock and, subject to compliance with applicable securities laws,
could sell their shares.

We depend on key personnel.
- ---------------------------

         We depend on our executive officers, including Ronald L. Havner, Jr.,
our chief executive officer and president. The loss of Mr. Havner or other
executive officers could adversely affect our operations. We maintain no key
person insurance on our executive officers.

                                       33



ITEM 3.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

         To limit the Company's exposure to market risk, the Company principally
finances its operations and growth with permanent equity capital consisting of
either common or preferred stock. At March 31, 2002, the Company's debt as a
percentage of shareholders' equity (based on book values) was 27.2%.

         The Company's market risk sensitive instruments include mortgage notes
payable which totaled $28,140,000 at March 31, 2002. All of the Company's
mortgage notes payable bear interest at fixed rates. See Note 6 of the Notes to
Consolidated Financial Statements for terms, valuations and approximate
principal maturities of the mortgage notes payable as of March 31, 2002. Based
on borrowing rates currently available to the Company, the carrying amount of
debt approximates fair value.

                                       34




PART II. OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS

         On November 3, 1999, the Company filed an action titled PS Business
Parks, Inc. v. Larry Howard et al. (Case No. BC219580) in Los Angeles Superior
Court seeking damages in excess of $1 million. The complaint alleges that Mr.
Howard and entities controlled by him engaged in unfair trade practices. Some of
the Company's claims have been dismissed on summary adjudication, and the
balance has been referred to the arbitration proceedings described below for
adjudication. Mr. Howard filed a cross-complaint which the Company intends to
vigorously contest and which is also in the process of being referred to
arbitration for adjudication.

         On November 27, 2000, Mary Jayne Howard, a former officer of the
Company filed a demand for arbitration with the American Arbitration Association
alleging claims against the Company for breach of contract, gender
discrimination, marital discrimination, and wrongful termination based on public
policy. The demand seeks damages of approximately $2 million. The Company plans
to vigorously contest these claims. The Company has also filed in the
arbitration a cross-claim against Ms. Howard alleging that she breached her
fiduciary duties to the Company and committed fraud, among other claims, seeking
damages in excess of $1 million.

         On February 2, 2000, the Company filed an action against Mary Piper,
its former Vice President of operations, in Riverside County Superior Court,
alleging claims for breach of fiduciary duties, fraud and deceit, constructive
fraud, negligent misrepresentation, violation of Section 17000 of Business and
Professions Code, violation of Section 17200 of the Business and Professions
Code and culpable negligence. The Company's claims arose from Ms. Piper's
alleged participation in a plan that resulted in the payment of improper
kickbacks to Larry Howard, a former vendor of the Company and the husband of
Mary Jayne Howard, a former officer of the Company. Ms. Piper subsequently filed
a cross-complaint which the Company intends to vigorously contest.

                                       35



ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

(a)      Exhibits

         12       Statement re: Computation of Ratio of Earnings to Fixed
                  Charges.  Filed herewith.

(b)      Reports on Form 8-K

         The Registrant filed a Current Report on Form 8-K dated January 30,
         2002 (filed January 31, 2002) pursuant to Item 9, relating to
         Regulation FD Disclosure.

                                       36




                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                 Dated:  May 3, 2002

                                 PS BUSINESS PARKS, INC.
                                 BY:/s/ Jack Corrigan
                                    -----------------
                                    Jack Corrigan
                                    Vice President and Chief Financial Officer

                                       37