<ARTICLE>                     5
<LEGEND>

                             PS BUSINESS PARKS. INC.
                      EXHIBIT 27 - FINANCIAL DATA SCHEDULE
                           ARTICLE 5 OF REGULATION S-X

</LEGEND>
<CIK>                                                                 0000866368
<NAME>                                                   PS Business Parks, Inc.
<MULTIPLIER>                                                                   1
<CURRENCY>                                                                U.S. $

                                                                          
<PERIOD-TYPE>                                                              6-MOS
<FISCAL-YEAR-END>                                                    DEC-31-2000
<PERIOD-START>                                                       JAN-01-2000
<PERIOD-END>                                                         JUN-30-2000
<EXCHANGE-RATE>                                                                1
<CASH>                                                                48,853,000
<SECURITIES>                                                          24,804,000
<RECEIVABLES>                                                          1,197,000
<ALLOWANCES>                                                                   0
<INVENTORY>                                                                    0
<CURRENT-ASSETS>                                                               0
<PP&E>                                                               857,160,000
<DEPRECIATION>                                                      (66,104,000)
<TOTAL-ASSETS>                                                       906,321,000
<CURRENT-LIABILITIES>                                                 26,602,000
<BONDS>                                                                        0
<PREFERRED-MANDATORY>                                                          0
<PREFERRED>                                                           55,000,000
<COMMON>                                                                 232,000
<OTHER-SE>                                                           501,829,000
<TOTAL-LIABILITY-AND-EQUITY>                                         906,321,000
<SALES>                                                                        0
<TOTAL-REVENUES>                                                      73,855,000
<CGS>                                                                          0
<TOTAL-COSTS>                                                         19,784,000
<OTHER-EXPENSES>                                                      19,138,000
<LOSS-PROVISION>                                                               0
<INTEREST-EXPENSE>                                                       744,000
<INCOME-PRETAX>                                                       22,255,000
<INCOME-TAX>                                                                   0
<INCOME-CONTINUING>                                                   22,255,000
<DISCONTINUED>                                                                 0
<EXTRAORDINARY>                                                                0
<CHANGES>                                                                      0
<NET-INCOME>                                                          22,255,000
<EPS-BASIC>                                                                 0.84
<EPS-DILUTED>                                                               0.84