The deal, the details of which were not released, wasorchestrated on behalf of the properties owners by Robert Donnelly,vice chairman of Cushman & Wakefield of NJ's Morristown office.Jeffrey Zell, president and chairman of the Washington, DC-based JMZell Partners, advised Sanofi-aventis. A timeline for the projectwas not released, although the property is said to be alreadyapproved for the expansion.

"This significant transaction will assist the local community inretaining its position as a mecca for major corporations," saysMark Yeager, president of Gale, a subsidiary of Mack-Cali RealtyCorp. "It also reflects our track record of establishing long-termrelationships with our tenants."

"This development is an example of the kind ofrelationship-driven opportunities we anticipated when Mack-Cali and Galejoined forces," says Mitchell Hersh, Mack-Cali's president and CEO.Sanofi-aventis leased the entire existing three-building complex at55 Corporate Dr. in 2005, consolidatingits North American operations from multiple locations in theregion. The property is fully net-leased through April 2023