Born on May 19, 1925, in Mount Vernon, N.Y., David Durst was the youngest of five children born to Joseph Durst, a Polish immigrant who worked his way up from pushcart vendor on the Lower East Side of Manhattan to garment factory owner and real estate investor, and his wife, Rose. Mr. Durst attended the Fieldston School in the Bronx and the Georgia Institute of Technology in Atlanta. The three Durst brothers had a largely amicable division of labor: Seymour was the deal maker, Royal leased and operated the buildings, and David was in charge of design and construction. Royal Durst died in 1993, Seymour Durst in 1995. Besides his son Jody, who is now president of the Durst Organization, Mr. Durst is survived by his second wife, Carola; his daughters, Laurel Strong and Robin Durst; his other sons, Josh and Kristoffer; and nine grandchildren.