Exhibit 23.1


            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement (Form
S-8 No. 333-91680) of Franklin Street Properties Corp. of our reports dated
February 21, 2006, with respect to the consolidated financial statements and
schedule of Franklin Street Properties Corp., Franklin Street Properties Corp.
management's assessment of the effectiveness of internal control over financial
reporting, and the effectiveness of internal control over financial reporting of
Franklin Street Properties Corp., included in this Annual Report (Form 10-K) for
the year ended December 31, 2005.

                                                           /s/ ERNST & YOUNG LLP

Boston, Massachusetts
February 21, 2006