Executive Vice President and Chief Operating Officer Peyton "Chip" Owen, Jr. will discuss the topic of "Adding Value Beyond the Portfolio" in the office industry. The presentation will be webcast live at approximately 11:05 a.m. GMT (5:05 a.m. CST), and will be archived through December 29, 2004. The webcast presentation will be available at www.equityoffice.com via the Investor Relations page. To be notified of other company webcasts, please enroll via EOP's Investor Relations page.

Equity Office Properties Trust (NYSE:EOP), operating through its various subsidiaries and affiliates, is the nation's largest publicly held office building owner and manager with a portfolio of 706 buildings comprising 125.9 million square feet in 18 states and the District of Columbia. Equity Office has an ownership presence in 27 Metropolitan Statistical Areas (MSAs) and in 125 submarkets, enabling it to provide wide range of office solutions for local, regional and national customers. For more company information, visit the Equity Office website at www.equityoffice.com