Exhibit 23.4

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-183927) and Form S-3D (No. 333-161664) of Winthrop Realty Trust and subsidiaries of our report dated March 28, 2014, relating to the consolidated financial statements of 701 Seventh WRT Investor, LLC, which report appears in the Annual Report on Form 10-K of Winthrop Realty Trust for the year ended December 31, 2014.

/s/ WeiserMazars LLP

Boston, Massachusetts

March 13, 2015