Residents of 15 William Street have access to unrivaled amenities like New York's most sort after building .These include 24 hours attended lobby, live-in resident manager, Penthouse Sky Lounge and Terrace, children's playroom, state-of-the-art fitness center, yoga/Pilates studio, Peloton Bikes, squash court, 50 ft. lap pool, half basketball court, outdoor hot tub and rainforest shower, sauna, steam room, covered dog run, and valet parking.