Filed Pursuant to Rule 433
Issuer Free Writing Prospectus
dated September 11, 2007
Registration No. 333-135110

HRPT PROPERTIES TRUST

This information supplements the information contained in the preliminary prospectus
supplement dated September 11, 2007 to the Prospectus dated June 19, 2006.

PRICING TERM SHEET

Size:

 

$250,000,000

Coupon (Interest Rate):

 

6.65% per annum

Security:

 

6.65% Senior Notes due 2018

Interest Payment Dates:

 

January 15 and July 15, commencing January 15, 2008

Maturity:

 

January 15, 2018

Price to Public:

 

99.146% of principal amount, plus accrued interest from September 18, 2007

Trade Date:

 

September 11, 2007

Settlement Date:

 

T+5; September 18, 2007

Net Proceeds:

 

$246,240,000 (before expenses associated with the transaction)

Redemption Provision:

 

Make-whole call at any time based on U.S. Treasury plus 0.40% (forty one-hundredths of one percent). If the notes are redeemed on or after July 15, 2017, the redemption price will not include a make-whole amount.

Yield to Maturity:

 

6.768%

Spread to Benchmark Treasury:

 

240 basis points

Benchmark Treasury:

 

U.S. Treasury 4.75% due August 15, 2017

Benchmark Treasury Price and Yield:

 

103-01+; 4.368%

Expected Ratings (Moody’s / S&P):

 

Baa2 (stable) / BBB (stable)

Type:

 

SEC Registered

Ranking:

 

Senior Unsecured

CUSIP:

 

40426WAV3

 

Joint Book-Running Managers:

 

Wachovia Capital Markets, LLC

 

$75,000,000

 

 

Merrill Lynch, Pierce, Fenner & Smith
                    Incorporated

 

$37,500,000

 

 

UBS Securities LLC

 

$37,500,000

 

 

 

 

 

Joint Lead Managers:

 

Morgan Stanley & Co. Incorporated

 

$20,000,000

 

 

RBC Capital Markets Corporation

 

$20,000,000

 

 

 

 

 

Co-Managers:

 

Banc of America Securities LLC

 

$ 4,000,000

 

 

BMO Capital Markets Corp.

 

$ 4,000,000

 

 

BNY Capital Markets, Inc.

 

$ 4,000,000

 

 

Calyon Securities (USA) Inc.

 

$ 4,000,000

 

 

Comerica Securities, Inc.

 

$ 4,000,000

 

 

Ferris, Baker Watts, Incorporated

 

$ 4,000,000

 

 

Greenwich Capital Markets, Inc.

 

$ 4,000,000

 

 

Janney Montgomery Scott LLC

 

$ 4,000,000

 

 

Morgan Keegan & Company, Inc.

 

$ 4,000,000

 

 

Oppenheimer & Co. Inc.

 

$ 4,000,000

 

 

Piper Jaffray & Co.

 

$ 4,000,000

 

 

PNC Capital Markets LLC

 

$ 4,000,000

 

 

SG Americas Securities, LLC

 

$ 4,000,000

 

 

Stifel, Nicolaus & Company, Incorporated

 

$ 4,000,000

 

 

SunTrust Capital Markets, Inc.

 

$ 4,000,000

 

The issuer has filed a registration statement (including a prospectus) with the Securities and Exchange Commission, or SEC, 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 or any underwriter participating in the offering will arrange to send you the prospectus supplement and accompanying prospectus if you request it by calling Wachovia Capital Markets, LLC toll-free at (866) 289-1262, Merrill Lynch, Pierce, Fenner & Smith Incorporated toll-free at (866) 500-5408 or UBS Securities LLC toll-free at (888) 722-9555 ext. 1088.

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