Free Writing Prospectus

Issuer Free Writing Prospectus

Filed Pursuant to Rule 433

Registration Statement No. 333-180058

September 5, 2012

PS BUSINESS PARKS, INC.

8,000,000 DEPOSITARY SHARES

EACH REPRESENTING 1/1000 OF A SHARE OF

5.75% CUMULATIVE PREFERRED STOCK, SERIES U

Final Term Sheet

 

Issuer:

   PS Business Parks, Inc. (PSB)

Security:

   Depositary Shares Each Representing 1/1000 of a Share of 5.75% Cumulative Preferred Stock, Series U

Size:

   8,000,000 depositary shares

Over-allotment Option:

   1,200,000 depositary shares at $25.00 per depositary share

Type of Security:

   SEC Registered - Registration Statement No. 333-180058

Public Offering Price:

   $25.00 per depositary share; $200,000,000 total (not including over-allotment option)

Underwriting Discounts:

   $0.7875 per share for Retail Orders; $5,364,561 total; and $0.50 per share for Institutional Orders; $593,930 total

Proceeds to the Company, before expenses:

   $194,041,509 total

Use of Proceeds:

   We expect to use a portion of the net proceeds to redeem depositary shares representing interests in our 6.700% Cumulative Preferred Shares, Series P at $25.00 per share, for a total redemption price of approximately $132.3 million, plus the accrued and unpaid dividends. We also expect to use the net proceeds from this offering for general corporate purposes, which may include the repayment of outstanding indebtedness and the acquisition of commercial properties.

Joint Book-Running Managers:

   Merrill Lynch, Pierce, Fenner & Smith
                         Incorporated
   Morgan Stanley & Co. LLC
   Wells Fargo Securities, LLC

Co-Managers:

   Credit Suisse Securities (USA) LLC
   J.P. Morgan Securities LLC
   RBC Capital Markets, LLC


Underwriting:       
     Number of
Firm Shares
 

Merrill Lynch, Pierce, Fenner & Smith

                       Incorporated

     2,266,666   

Morgan Stanley & Co. LLC

     2,266,668   

Wells Fargo Securities, LLC

     2,266,666   

Credit Suisse Securities (USA) LLC

     400,000   

J.P. Morgan Securities LLC

     400,000   

RBC Capital Markets, LLC

     400,000   

Distribution Rights:

   5.75% of the liquidation preference per annum; Distributions begin on December 31, 2012

Redemption:

   The depositary shares may not be redeemed until on or after September 14, 2017, except in order to preserve our status as a real estate investment trust.

Settlement Date:

   September 14, 2012 (T+7)

Selling Concession:

   $0.50/depositary share for Retail Orders; $0.30/depositary share for Institutional Orders

Reallowance to other dealers:

   $0.45/depositary share

CUSIP Number:

   69360J 669

ISIN Number:

   US69360J6698

The Issuer has filed a registration statement (including a prospectus with the SEC) and prospectus supplement for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement, the prospectus supplement, and other documents the issuer has filed with the SEC for more complete information about the issuer and this offering. You may get these documents for free by visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the issuer, any underwriter or any dealer participating in the offering will arrange to send you the prospectus or prospectus supplement if you request it by calling Merrill Lynch, Pierce, Fenner & Smith Incorporated toll-free 1-800-294-1322, Morgan Stanley & Co. LLC toll-free 1-866-718-1649 or Wells Fargo Securities, LLC toll-free 1-800-326-5897.

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