Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

Sold on 2/27/2025 for $8,250,000

Interested in this property?
Closed For Sale Co-op

$9,500,000

635 Park Avenue #9th Floor

Lenox Hill, Manhattan

MLS® #RLS10993058

RLS at REBNY

Listing by Sothebys International Realty

4

Bedrooms

4.5

Baths

Sq. Ft.

1912

Year Built

Quick Summary

Bedrooms 4
Bathrooms 4 full, 2 half
Lot Size 6,034 sq ft
Year Built 1912
Ownership Co-op
Maintenance $18,264/mo
Neighborhood Lenox Hill
Floor 9 of 13

Property Highlights

  • Views: City
  • Exposure: East,North,South,West facing
  • Fireplace: 1 fireplace

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 10
Baths 3 Full, 2 Half
Floor 9 of 13
View City
Exposure East,North,South,West
Pets Yes
Year Built 1912
Architectural Style Prewar
Structure Type HighRise
Furnished Unfurnished
Lot Size 6,034 sq ft
Block/Lot 01400/0069

Description

This large, magnificently proportioned, 14-into-10 room apartment encompasses the entire 9th floor of 635 Park Avenue, a building designed in 1912 by the renowned architect J.E.R. Carpenter. Attractively renovated by Colefax and Fowler and other designers, the apartment has been meticulously maintained and, truly, is in pristine condition. The property is full of light with 10’ ceilings and has large eight-over-eight mullioned windows as well as central and thru-wall air conditioning throughout. One enters the apartment from a private elevator landing leading into a foyer and the memorable circular entrance gallery. This delightful and unusual space serves as the hub of the apartment and the living room, library, and stunning Biedermeier style wet bar all radiate out from it. The elegant corner living room, facing Park Avenue, is of exceptionally large size with woodburning fireplace and flows into the equally impressive sun-filled formal dining room that comfortably seats 18 people. The intimate library, with woodburning fireplace, is fitted with bookshelves. A long corridor, off the foyer, leads to the three large bedrooms with en suite baths. The primary one, entered through a discrete elliptical vestibule with two closets, is located on the corner of 66th Street and Park Avenue. It has fabulous views looking north up Park Avenue and west towards Central Park. Its spacious over-size bathroom has a walk-in shower, two sinks and an open-plan dressing room with two large closets. At the other end of the bedroom hall is a fourth, smaller bedroom, currently used as a gym. The newly renovated, bright and airy kitchen, beautifully designed by Bilotta Kitchens with top of the line appliances and cabinets, has a large central island and access to the dining room and wet bar. Also, off the kitchen, are the comfortable and appealing media room with its flat screen TV and the generous laundry room with great storage space and direct access to the service elevator. There are two powder rooms in the apartment: one off the entrance foyer, the other beside the fourth bedroom or gym. 635 Park Avenue, conveniently located on the corner of 66th Street across the street from the Park Avenue Armory, is a full-service cooperative with live-in super and full-time doormen. The building has a fitness room and private storage space in the basement. 50% financing allowed. 1.5% flip tax

Features & Amenities

Interior Features

Eat In Kitchen Kitchen Window In Unit Fireplace (1)

Appliances

Dishwasher

Building Information

Total Units 16
Stories 13
Structure HighRise
Style Prewar

Financial Details

Maintenance $18,264/mo
Sale Price $8,250,000
Previous Price $11,500,000

Lenox Hill offers a sophisticated blend of residential tranquility and cosmopolitan convenience. As one of the most coveted sections of the Upper East Side, the neighborhood is defined by its proximity to Central Park, world-class medical institutions, and the high-end boutiques of Madison Avenue. The housing stock here is diverse, ranging from palatial pre-war cooperatives to sleek, modern condominiums that offer sweeping views of the East River and the city skyline.

Lenox Hill Live Market Data

View Neighborhood

Active Listings

567

Median Asking Price

$1.52M

Median $/Sqft

$1,370

Avg Days on Market

N/A

New This Week

18

Price Reduced

32%

Sold (30 Days)

68

Median Sale Price

$1.63M

Live data from RLS at REBNY • Updated 3/11/26, 8:53 AM EST

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Location

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635 Park Avenue #9th Floor, Lenox Hill, New York County

Virtual Tour

MLS® ID: RLS10993058
First Listed: 2/1/2024
On Market: 2/1/2024
Price Changed: 9/3/2024
Closed: 2/27/2025
Contract Date: 2/1/2024

Listing Courtesy of Sothebys International Realty - Kathryn Steinberg

Listing Contact: (212) 606-7756

Listing information for certain New York City properties provided courtesy of the Real Estate Board of New York's Residential Listing Service (the "RLS"). The information contained in this listing has not been verified by the RLS and should be verified by the consumer. The listing information provided here is for the consumer's personal, non-commercial use. Retransmission, redistribution or copying of this listing information is strictly prohibited except in connection with a consumer's consideration of the purchase and/or sale of an individual property. This listing information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc., all rights reserved. This advertisement does not suggest that the broker has a listing in this property or properties or that any property is currently available.

Broker Commission Disclosure: Broker commissions are not set by law and are fully negotiable.

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 3/11/2026 at 12:53 PM UTC

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