NEW YORK CITY — Rosewood Realty Group has negotiated the sale of four walk-up apartment buildings in the Bronx for $7.3 million. The properties sold for 11 times the current rent roll at a 5.5 percent cap rate. The four-story buildings, which are located at 2542-2548 White Plains Road, are comprised of 24 residential units and eight retail storefronts that include a local grocery, restaurant and beauty salon. Built in 2008, the attached properties total 29,140 square feet. Rosewood Realty represented the buyer, a group of private investors, and the seller, Madison Realty Capital, in the transaction.