Exhibit 99.1

                                  News Release
                             PS Business Parks, Inc.
701 Western Avenue
Glendale, CA 91201-2349
www.psbusinessparks.com

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                                                       For Release: Immediately
                                                       Date: February 24, 2009
                                                       Contact: Edward A. Stokx

(818) 244-8080, Ext. 1649

                 PS Business Parks, Inc. Announces New Director

GLENDALE,  California--PS  Business Parks, Inc. (NYSE:PSB)  announced today that
Jennifer Holden Dunbar has joined the Board of Directors. Her election by the PS
Business  Parks' Board was effective  February 23, 2009. The PS Business  Parks'
Board now has a total of nine directors.

Ms.  Dunbar,  45, has been a member of the Board of  Directors of Big 5 Sporting
Goods Corporation since 2004. Since 2001, she has been the managing director and
was the co-founder of Dunbar  Partners,  LLC, an  investment/advisory  firm that
makes direct  investments  in and provides  strategic,  due  diligence and human
capital services to private equity firms and middle market companies. Ms. Dunbar
was  previously a partner with  Leonard  Green and Partners  where she spent ten
years  investing in private equity  transactions  and serving on numerous public
and private company boards.

"We  are  pleased  to  welcome  Jennifer  to the PS  Business  Parks'  Board  of
Directors," said Joseph D. Russell,  Jr.,  President and Chief Executive Officer
of PS Business Parks. "As a seasoned investment professional, we look forward to
Jennifer  bringing her  broad-based  business  knowledge  and  experience to our
Board."


Company Information

PS Business Parks, Inc., a member of the S&P SmallCap 600, is a self-advised and
self-managed  equity  real  estate  investment  trust  ("REIT")  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 a  number  of  uses  (including  office,  assembly,  showroom,
laboratory,  light  manufacturing and warehouse space). As of December 31, 2008,
PSB  wholly  owned   approximately   19.6  million  rentable  square  feet  with
approximately   3,800  customers  located  in  eight  states,   concentrated  in
California (5.8 million sq. ft.),  Florida (3.6 million sq. ft.),  Virginia (3.0
million sq. ft.),  Texas (2.9 million sq. ft.),  Maryland (1.8 million sq. ft.),
Oregon (1.3 million sq. ft.),  Arizona (0.7 million sq. ft.) and Washington (0.5
million sq. ft.).

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