20 East End Avenue's stunning three-story townhome custom designed by the world- renowned architect Robert A.M. Stern, blends the luxury of a private home with all the benefits and amenities of a full-service, white-glove building. Spanning a generous 5,201 square feet of interior space and 663 square feet of private, sunny exterior space, this elegant residence features herringbone-patterned, walnut-stained Appalachian white oak floors, custom moldings, oversized casement windows, and a gas fireplace. Designed in the spirit of a classic New York City 25 foot townhome, this stately residence offers a gracious entry foyer with a grand circular staircase that connects the entertaining and living spaces with the private quarters above. The home features a large chef's kitchen with Gaggenau 400 series appliances and custom cabinetry designed by Robert A.M. Stern. There is a large formal dining room and an expansive living room that opens onto a private landscaped courtyard. The master suite features a morning kitchen perfect for that first cup of coffee, as well as two large walk-in closets. Three additional bedrooms, each with en-suite baths, complete the second level. A private interior elevator transports you to the vast lower level with a large flexible space ideal for a screening room, kids' playroom, or game room. The lower level also features a half bath (convertible into a full bath) and a large utility room with washer, dryer, and sink. Additionally, the lower level offers an entrance to 20 East End's robust and elegant amenities' program that feels like an extension of the home. With a fully equipped fitness center, a spa featuring sauna, steam and private treatment room, a teen arcade, and a luxurious library with adjoining billiards, card and bar rooms, no detail is overlooked. This beautiful home offers one of the last opportunities to own in this signature Robert A.M. Stern building. Enjoy the privacy and status of a single family home on the Upper East side, while still having all of the convenience and elegance of 20 East End's amenities and services. This residence is the epitome of perfection and elegance in the private enclave of East End Avenue.