Major southeast Queens landlord Zara Realty bought a six-building, 96-unit multifamily portfolio in Jamaica for $21.5 million. The family firm, which owns more than 2,000 units, bought the four-story walkups at 150-01 through 150-11 88th Avenue, which combined span an area of about 42,500 square feet. All 96 units are rent stabilized. The seller was the Gowanus-based Lagadakia Realty Corp., headed by George Ntlis, Peter Dilis and Nick Haviaras.