PS Business Parks, Inc. to Release Third Quarter 2009 Earnings and Host Quarterly Conference Call

GLENDALE, Calif.--(Business Wire)--
PS Business Parks, Inc. (NYSE:PSB) announced today that it intends to release
its third quarter 2009 earnings after the close of business on Monday, November
2, 2009.

A conference call is scheduled for Tuesday, November 3, 2009, at 10:00 a.m.
(PST) to discuss the third quarter results. The toll free number is (888)
299-3246; the conference ID is 35345374. The call will also be available via a
live webcast on the Company`s website. A replay of the conference call will be
available through November 10, 2009 at (800) 642-1687, as well as via webcast on
the Company`s website.

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 September 30, 2009,
PSB wholly owned approximately 19.6 million rentable square feet with
approximately 3,750 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.

PS Business Parks, Inc.
Edward A. Stokx
(818) 244-8080, Ext. 1649

Copyright Business Wire 2009