20 East End Avenue, the boutique amenity-rich condominium designed inside and out by Robert A.M. Stern Architects, has revealed its one-and-only maisonette residences. The residence offers the experience of living in a private home on the Upper East Side within a full-service luxury building.

The maisonette spans 4,737 SF spread over 5 bedrooms and 5 bathrooms. The home features a gracious gallery entry with a grand staircase connects the living and entertaining areas with the bedrooms, creating an element of privacy that mimics the layout of a single-family home. The residence also features Appalachian oak herringbone flooring, soaring ceilings and expansive casement windows that flood the home with natural light and tree-lined vistas. The maisonette also offers it’s own private entrance, as well as access to all of the building’s private club-inspired amenities, which include a library, billiards and game room, wine cellar, fitness center and spa, and juniors lounge.

The maisonette is currently on the market for $10,895,000.