Built alongside the Carlyle Hotel in 1929–1930, Carlyle House is a separate 17-story cooperative located at 50 East 77th Street, sharing a 12-story base with the hotel. Known for its refined pre-war Moderne style, it features spacious residences—some with dramatic double-height living rooms—and a stylish, sophisticated lobby with attentive service. Residents enjoy optional access to Carlyle Hotel amenities, including room service and the fitness center, on a pay-as-used basis. The co-op also owns valuable Madison Avenue retail space, providing strong potential income.