Perched on the top floor of 550 Park Avenue, a pre-war white-glove J.E.R. Carpenter co-operative, this spectacular sun-flooded corner home is a true architectural masterpiece with breathtaking southern, eastern, northern and western vistas of the iconic Manhattan skyline including Central Park and the East River. Expertly redesigned by Hottenroth + Joseph Architects with NFR Consulting and Silver Rail Construction as nine grand rooms from its original twelve, no expense was spared utilizing the best of materials and systems while restoring the elegance of old-world detail. With 90' of frontage on Park Avenue, there are four bedroom suites plus a staff bedroom, three windowed full renovated marble bathrooms, and a powder room. The entertaining spaces include a 38' long corner living room, a 25' long formal dining room, a library, and a windowed eat-in kitchen with an additional serving kitchen. Each room has generous scale, oversized windows, bountiful natural light, and ceilings reaching 10'6". Throughout the residence, there are three wood-burning fireplaces, raised doorways, radiant heat in the full bathrooms, custom moldings and millwork, Waterworks fixtures, and Von Morris hardware. All mechanical elements of this sophisticated home have been fully modernized including multi-zone central air conditioning with humidification, a Lutron lighting system, and a Sonos music system.From an elegant private elevator landing clad in antique mirror, an impressive entrance gallery with an oversized coat closet and a powder room set the stage for this magnificent home. Two stunning doorways distinguish the public spaces to the north from the private quarters to the south. In the northeast corner is the palatial living room with picturesque views and the first wood-burning fireplace. Adjacent is the regal formal dining room. Both rooms have expansive views and sunlight overlooking the unobstructed Upper East Side Historic District skyline. The chef's windowed eat-in kitchen has been meticulously renovated with custom Boffi cabinetry and honed black cosmic granite countertops and backsplashes. It is equipped with a Subzero refrigerator and freezer, and Gaggenau appliances including two ovens, a five-burner range, a steam cooker, a microwave, two warming drawers, and a dishwasher. The large eat-in area has a center island with seating as well as a separate dining area. Through Metalform Studio blackened steel doors is a fully-equipped serving kitchen with a Subzero refrigerator/freezer and icemaker, two full-height Gaggenau wine refrigerators, a Gaggenau dishwasher, and endless amounts of storage. Also off the kitchen is a laundry area with a Miele washer/dryer and a sink. The grand primary bedroom suite overlooks Park Avenue and is adjacent to the handsome library; between the two rooms is a double-sided wood-burning fireplace. There is a lavish dressing room that is 14' by 7' as well as an additional dressing area with three more closets. The luxurious en-suite bathroom is beautifully clad in Keystone Aurora and Plumeria marble with two sinks, an oversized shower, and a separate floating bathtub. The second bedroom occupies a corner, enjoying east and south exposures. The southwest bedroom features the third wood burning fireplace as well as views of Central Park. The two bedrooms share a windowed oversized bathroom, finished with Keystone Aurora and Arabescato marble. The fourth bedroom has five closets. There is also a staff bedroom or home office and a windowed hallway bathroom finished in Comet and Bardiglio Dark marble. A separate windowed room on the building's first floor, as well as a large basement storage bin, convey with the apartment.Completed in 1917, 550 Park Avenue is a premier prewar co-operative which houses thirty-six homes. Pied-a-terres and pets are allowed. Financing is not permitted and there is a 3% flip tax paid by the purchaser.