Thomas Properties Group Announces TGS-NOPEC Geophysical Company's 67,691-Square-Foot Lease In 2500 CityWest Boulevard

HOUSTON—August 23, 2010—Thomas Properties Group, Inc. (NASDAQ:TPGI) has announced that TGS-NOPEC Geophysical Company, a global geo-science data firm, has expanded by 7,829 square feet and renewed its lease, for a total of 67,691 square feet, in 2500 CityWest, 2500 CityWest Boulevard. The CityWest office serves as the worldwide operational headquarters for TGS, with its financial headquarters in Oslo, and offices in Stavanger, London, Moscow and Perth. With this lease, 2500 CityWest is now 92 percent leased.

Chip Colvill, Michael Anderson and Win Haggard Jr. of Colvill Office Properties represented the landlord, TPG/Cal/STRS, LLC, a joint venture of Thomas Properties Group and the California State Teachers' Retirement System. Jon Silberman and Griff Bandy of NAI Houston represented TGS-NOPEC in lease negotiations.

2500 CityWest is a 578,284-square-foot, 25-story office building in the Westchase area of Houston. Situated on an 8.13-acre site near the Sam Houston Parkway and Westheimer Road in West Houston, 2500 CityWest is accessible to Interstate 10, Beltway 8, Westpark Toll Road, Highway 6 and both Houston airports. The residential neighborhoods of Memorial, Katy and Sugar Land are in the immediate area. 2500 CityWest includes efficient 23,000-square-foot floor plates, conference rooms, a 2,178-car parking garage, deli/carry-out restaurant and full-service bank.

About Thomas Properties Group, Inc.
Thomas Properties Group, Inc., with headquarters in Los Angeles, is a full-service real estate company that owns, acquires, develops and manages primarily office, as well as mixed-use and residential properties on a nationwide basis. The company's primary areas of focus are the acquisition and ownership of premier properties, property development and redevelopment and property and investment activities. For more information on Thomas Properties Group, Inc., please visit www.tpgre.com.

Forward-Looking Statements:
Statements made in this press release that are not historical may contain forward-looking statements. Although Thomas Properties Group believes the expectations reflected in any forward-looking statements are based on reasonable assumptions, these statements are subject to numerous risks and uncertainties. Factors that could cause actual results to differ materially from the company's expectations include actual and perceived trends in various national and economic conditions that affect global and regional markets for commercial real estate services, including interest rates, the availability of credit and equity investors to finance commercial real estate transactions, our ability to enter into or renew leases at favorable rates, which can be impacted by the financial condition of our tenants, risks associated with the success of our development and property redevelopment projects, general volatility in the securities and credit markets and the impact of tax laws affecting real estate. For a discussion of some of the factors that may cause our results to differ from management’s expectations, see the information under the captions “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Factors That May Influence Future Results of Operations” in our Form 10-K for the year ended December 31, 2009, and contained in our reports on Form 10-Q for fiscal quarters during 2010, which are filed with the SEC. Thomas Properties Group, Inc., disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Media Contact:

Sara McDaniel
McDaniel & Co. for Thomas Properties Group
713.523.4441 or 800.628.6028