Sean Mason of CRER represented the buyer, Mavrek Development, Inc., and the seller, a local investor group, in the sale of 4501 N. Sheridan, Chicago, IL 60640.  The former retail strip will be re-developed by Mavrek into a 59-unit luxury apartment complex with 36 parking spaces and 7,000 square feet of retail space on the ground floor at Sheridan Road and Sunnyside Avenue.