Stunning, spacious, sunny 4-bedroom home with 10 foot ceilings in one of the Upper West Side's finest full service buildings. Enter from a semi-private landing to a gallery with built-in marble-topped cabinetry designed for maximum storage and with wall space for art. Off the gallery are a coat closet, storage closet and powder room with shower. The living area consists of a large open living and dining room and a breakfast area. Floor to ceiling windows overlook the building's own quiet courtyard. The chef's kitchen, which opens to the breakfast area, has Viking appliances, stone countertops, glass backsplash, custom cabinetry and Waterworks fixtures. The West-facing master bedroom suite's built-ins include a window seat with room for 2, perfect for Sunday afternoon reading (and naps). A walk-in master closet leads to a luxurious en-suite windowed bathroom with marble flooring, floor-to-ceiling white glass tiles, double vanity, soaking tub and oversized glass shower. Two bedrooms are in their own wing with a full bathroom and the laundry area. Both of these bedrooms have wonderful closets, custom window seats, and East-facing views. They share a bathroom with a double vanity, porcelain tile walls and limestone floors. The fourth bedroom is off the breakfast area and is currently configured as a home office and den. It can also be a guest or nanny's room, a nursery or a kids play area. The apartment's powder room with shower can serve as this fourth bedroom's own directly accessible private bathroom. Soaring ceilings, custom built-ins and hardwood floors throughout. Two zone central air and heat. A large storage unit in the building's lower level is included with the apartment. The building's private courtyard has a playground, basketball court and picnic area, allowing children to play outdoors without leaving the premises. Indoor teen room on the lobby level. The gym has state-of-the-art equipment, a 51-foot four lane lifeguard-manned indoor pool, a yoga and Pilates room, daily fitness and water aerobics classes and men's and women's locker areas with steam rooms and showers. Residents can work with the gym's in-house trainers or their own personal trainers and coaches. Adjacent to the gym is a children's playroom with toys, books and games. Enjoy a second floor planted limestone terrace for relaxing and dining al fresco. Ariel West residents also have access to amenities in Ariel East directly across the street, including a party room, lounge, billiards table, grand piano, private screening room and table tennis, as well as another gym and playroom. Perfect for runners, bikers, dog owners and park-lovers, Ariel West is steps from both Riverside Park and Central Park, over one thousand acres of "better than the suburbs backyard. Short stroll to the Columbia campus. Restaurants, boutiques. Whole Foods. Easy access up the west side to the Hill schools. Two express stops to midtown from the renovated 96th Street station. Co-exclusive.