Excelsior 57th Corp. is one of Manhattan s largest and most luxurious residential co-operatives. It holds 48 floors and 374 residential apartment units. The building features a number of facilities, consisting of a concierge, doorman, elevator operators and health club, among others. Located in New York, N.Y., some of its others features include roof deck, swimming pool, garage as well as laundry and dry cleaning service. Manhattan Community Board serves the building and is fireproof concrete structure.