Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
635 PARK Avenue #MAISONETTE
Interested in this property?
Active For Sale Co-op

$1,995,000

635 PARK Avenue #MAISONETTE

Lenox Hill, Manhattan

MLS® #RLS20091282

RLS at REBNY

Listing by Coldwell Banker Warburg

2

Bedrooms

3

Baths

N/A

Sq. Ft.

1913

Year Built

Quick Summary

Bedrooms 2
Bathrooms 3
Year Built 1913
Ownership Co-op
Maintenance $6,637/mo
Neighborhood Lenox Hill
Floor 1 of 13

Property Highlights

  • Views: Other
  • Exposure: East,West facing
  • Fireplace: 1 fireplace

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 5
Baths 3 Full
Floor 1 of 13
View Other
Exposure East,West
Cooling Other
Pets Yes
Year Built 1913
Structure Type HighRise
Basement Other
Block/Lot 01400/0069

Listing History

Event Date Price Change
Listed May 14, 2026 $1,995,000 -
Currently May 14, 2026 $1,995,000 -

Description

635 Park Avenue offers a rare level of privacy and pedigree in the heart of the Upper East Side. Designed by legendary architect J. E. R. Carpenter, this intimate white-glove cooperative contains just thirteen grand residences and a single maisonette - a uniquely elegant and generously sized 2-bedroom home with 3 large bathrooms, moments from Central Park.

Positioned on the corner of East 66th Street and Park Avenue, this sophisticated maisonette combines classic prewar architecture with thoughtful modern upgrades. High ceilings, original moldings, herringbone floors, and beautifully scaled rooms create a sense of understated grandeur throughout. The expansive living room enjoys natural light from Park Avenue and offers an exceptional setting for entertaining or quiet daily living.

The kitchen has recently been updated with premium appliances, including a Bosch refrigerator, dishwasher, and oven, along with an in-unit Miele washer and dryer - seamlessly integrates contemporary convenience into the home's timeless character.

Privately situated away from the entertaining spaces, the two bedrooms offer exceptional tranquility and generous proportions. A separate space can easily act as a home office or open dining room. Abundant closets and deeded private storage further enhance the home's livability.

Residents of 635 Park Avenue enjoy an exceptionally discreet and attentive level of service, including a full-time doorman, porter, resident superintendent, fitness room, and private storage. Just moments from Madison Avenue boutiques, world-class dining, the museums, the Park Avenue Armory, and Central Park, this is Upper East Side living at its most refined.

Features & Amenities

Interior Features

High Ceilings Building None Fireplace (1)

Exterior Features

None

Appliances

Dishwasher

Building Information

Building Data View Compliance & Permits
Total Units 16
Stories 13
Structure HighRise

Financial Details

Maintenance $6,637/mo

Lenox Hill occupies a residential section of the Upper East Side, defined by proximity to Central Park, major medical institutions (Memorial Sloan Kettering, Weill Cornell, Lenox Hill Hospital), and the Madison Avenue retail corridor. Housing stock ranges from large pre-war cooperatives to modern condominiums with East River and skyline views.

Lenox Hill Live Market Data

View Neighborhood

Active Listings

632

Median Asking Price

$1.70M

Median $/Sqft

$1,426

Avg Days on Market

N/A

New This Week

39

Price Reduced

38%

Sold (30 Days)

61

Median Sale Price

$1.46M

Live data from RLS at REBNY • Updated 5/14/26, 6:50 PM EST

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Location

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635 PARK Avenue #MAISONETTE, Lenox Hill, New York County

Building Information

Official NYC property records for this building

1913
Year Built
113 years old
13
Floors
16
Residential Units
R10
Zoning District
Elevator Apartments Historic District: Upper East Side Historic District

Tax & Assessment

Assessed Value: $9,554,400
Land Value: $1,138,500
Exemptions: $0

Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.

Lot Area: 6,034 SF
Building Area: 67,600 SF
Built FAR: 11.2
Allowed FAR: 10

Source: NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning (data.cityofnewyork.us)

Want help estimating ownership costs or understanding building compliance? Let's discuss

Frequently Asked Questions

Common questions about this property

The current listed monthly maintenance are $6,637 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 2 bedrooms and 3 full bathrooms.

According to MLS records, the building was constructed in 1913, making it approximately 113 years old.

This listing is a co-op (stock cooperative). Buyers purchase shares in a corporation rather than real property, and the board must approve all sales.

Pets are permitted at this property. Contact the listing broker for weight limits or breed restrictions.

To schedule a private showing, contact Milton Coste at (917) 416-7433 or [email protected]. Per REBNY guidelines effective 2025, a Buyer Representation Agreement is required before a buyer's broker can show you properties. You may attend open houses independently without one.

Have a question not answered here?

(917) 416-7433
MLS® ID: RLS20091282
First Listed: 5/14/2026
On Market: 5/14/2026
Price Changed: 5/14/2026
Contract Date: 5/14/2026

Listing Courtesy of Coldwell Banker Warburg - June L Gottlieb

Listing Contact: (917) 826-9996

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.

Buyer Notice: Planning to work with a buyer's broker? A Buyer Representation Agreement is required before your broker can show you properties, per REBNY/UCBA guidelines (effective 2025). You may attend open houses independently without one.

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 5/14/2026 at 10:50 PM UTC

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