15 Union Sq W

15 Union Square West is a converted 19th-century commercial building reimagined as a 12-story boutique condominium. Completed originally in 1870 and adaptively rebuilt into luxury residences, the property preserves cast-iron arches and tall, arched windows while presenting a contemporary zinc-and-glass street face. The collection of about three dozen residences ranges mainly two- and three-bedroom duplexes and lofts with dramatic ceiling heights, oversized floor-to-ceiling windows, wide-plank hardwood floors, and custom millwork. Interiors commonly feature eat-in and galley kitchens with large islands, recessed lighting, central HVAC, double vanities, soaking tubs or wet-room showers, walk-in closets, and occasional private terraces or roof decks. Shared spaces are finished to a spa-like standard: a wellness area with sauna, massage room, and a 50-foot lap pool with oversized whirlpool, plus a fitness studio (yoga/Pilates) and recreation/game room. The building operates full-service with a 24-hour doorman, onsite concierge, valet services, porters and residential staff; additional conveniences include bicycle storage and individual storage lockers. Limited on-site parking is managed via valet. Pet policies are typical of full-service Manhattan condos and are handled by the managing office. Located directly on Union Square Park at the nexus of Flatiron, Greenwich Village and Gramercy, the address provides immediate access to restaurants, markets, and multiple subway lines, supporting both a walkable urban lifestyle and strong transit connectivity.