News Release                                                        Exhibit 99.1
PS Business Parks, Inc.
701 Western Avenue
P.O. Box 25050
Glendale, CA  91221-5050
www.psbusinessparks.com


                                        For Release:     Immediately
                                        Date:            September 9, 2002
                                        Contact:         Mr. Jack Corrigan
                                                        (818) 244-8080, Ext. 663


Glendale,  California - PS Business Parks, Inc. (AMEX: PSB) announced today that
Joseph D.  Russell,  Jr. has joined the Company as President.  Mr.  Russell will
lead PSB's  management  team as well as implement its  investment  and financial
strategies. He will report to Chairman and Chief Executive Officer Ron Havner.

Mr.  Russell is a seasoned and highly  regarded  executive with over a decade of
experience in both private and public real estate  companies.  He joined Spieker
Partners in 1990 and became an officer of Spieker Properties when it went public
as a REIT in 1993.  Prior to its merger with Equity Office  Properties  (EOP) in
2001,  Mr. Russell was President of Spieker  Properties'  Silicon Valley Region.
During his tenure,  Mr. Russell  invested  nearly one billion dollars and helped
grow Spieker's  Silicon  Valley  portfolio into nine million square feet of high
quality industrial and office properties with annual NOI of nearly $200 million.

Ron Havner,  Chairman and CEO of PSB commented:  "Joe's  exceptional  leadership
skills  combined with his broad real estate  industry  experience at the premier
office/industrial  REIT of the  last  decade,  Spieker  Properties,  make him an
outstanding  addition to our executive  management  team. I'm confident in Joe's
ability to create significant value for our owners."

Joe  Russell  commented:  "PS  Business  Parks  has grown  dramatically  with an
exceptional  emphasis  on  quality  properties  in  desirable  markets,  further
enhanced by strong financial management. The Company has succeeded in creating a
unique  platform  of highly  flexible,  well-located  business  parks and a very
unique financial structure.  I am thrilled to be joining PSB's dedicated team of
professionals."

Mr.  Russell earned a Bachelor of Science degree from the University of Southern
California and a Masters of Business  Administration  from the Harvard  Business
School.  He also  spent  approximately  six years  with  International  Business
Machines  in  various  marketing  positions.  Mr.  Russell  holds  a  number  of
professional  designations and currently serves as the President of the National
Association of Industrial and Office Properties (NAIOP), Silicon Valley Chapter.

Bob Rollo and Marty Nass of TMP Executive  Search conducted the search on behalf
of PS Business Parks.

Accounting for Stock Options
- ----------------------------
During the third quarter of 2002 the Company will begin expensing the fair value
of options  granted  under the  Company's  stock option  plan.  The Company will
record the expense over the option vesting  period,  using the fair value at the
date of grant. The accounting  treatment has been adopted on a prospective basis
and is applied to all options  granted on January 1, 2002 or later.  The Company
currently  anticipates the 2002 full-year  expense to be approximately  $0.01 to
$0.02 per share.



Sale of Property
- ----------------
The Company recently completed the sale of its 61,000 square foot Overland Park,
Kansas  business  park  for  approximately  $5.0  million.  As a  result  of the
transaction,  the Company will recognize a gain of approximately $1.9 million or
$0.06 per share in the third quarter for financial statement purposes.

Company Information
- -------------------
PSB is a self-advised and self-managed  equity real estate investment trust that
acquires,  develops,  owns and operates commercial  properties,  primarily flex,
multi-tenant  office and industrial  space.  The Company defines "flex" space as
buildings that are configured  with a combination of office and warehouse  space
and can be designed to fit an almost limitless number of uses (including office,
assembly, showroom,  laboratory, light manufacturing and warehouse space). As of
June 30, 2002, PSB wholly-owned  approximately  14.8 million net rentable square
feet of commercial space with approximately 3,300 customers located in 9 states,
concentrated  primarily in California  (4,673,000 sq. ft.), Texas (2,983,000 sq.
ft.),  Oregon  (1,973,000  sq. ft.),  Virginia  (2,621,000 sq. ft.) and Maryland
(1,769,000 sq. ft.).

Additional  information  about PS  Business  Parks,  Inc.  is  available  on the
Internet.     The    Company's    web    site    is     www.psbusinessparks.com.
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