<TABLE> <S> <C>
<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.
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<CURRENCY> U.S. $
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
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<CASH> 56,613,000
<SECURITIES> 26,475,000
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<DEPRECIATION> (75,003,000)
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<CURRENT-LIABILITIES> 27,016,000
<BONDS> 0
0
55,000,000
<COMMON> 231,000
<OTHER-SE> 505,613,000
<TOTAL-LIABILITY-AND-EQUITY> 923,518,000
<SALES> 0
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<INCOME-PRETAX> 33,726,000
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<INCOME-CONTINUING> 33,726,000
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<EPS-BASIC> 1.28
<EPS-DILUTED> 1.28
</TABLE>