Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
640 PARK Avenue #9THFLOOR
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Active For Sale Co-op

$25,000,000

640 PARK Avenue #9THFLOOR

Lenox Hill, Manhattan

MLS® #RLS20070171

RLS at REBNY

Listing by Brown Harris Stevens Residential Sales LLC

5

Bedrooms

6

Baths

N/A

Sq. Ft.

1914

Year Built

Quick Summary

Bedrooms 5
Bathrooms 6
Year Built 1914
Ownership Co-op
Maintenance $21,113/mo
Neighborhood Lenox Hill
Floor 9 of 12

Property Highlights

  • Climate Control: Other
  • Character: Pre-war building (1914)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 15
Baths 6 Full
Floor 9 of 12
Cooling Other
Pets Yes
Year Built 1914
Structure Type HighRise
Basement Other
Block/Lot 01381/0035

Listing History

Event Date Price Change
Listed Feb 3, 2026 $25,000,000 -
Currently May 4, 2026 $25,000,000 -

Description

Be sure to reference the video for additional context.

At the foot of Lenox Hill is 640 Park Avenue, which was originally developed by the Fullerton Weaver Realty Company in 1914.

A century ago, The Real Estate Record & Guide, the industry rag of its day, wrote that architect J.E.R. Carpenter "was the father of the modern large apartment here in New York." Later Christopher Gray of The NYT wrote that, "In 1914 Mr. Carpenter designed, and again partly owned, the impressive 640 Park, at 66th Street. It is all limestone, with double sets of Florentine-style windows and one five-bedroom apartment per floor. This marked his arrival into the stratosphere of luxury apartments, with a separate gallery, reception room, wine closet and six servants' rooms, including a separate section for the butler and the 'second man.'"

Upon arriving on the 9th floor and your own private elevator landing, Gray's description of Carpenter's design comes off the page. Once you indeed enter into the commodious, nearly 375 sqft gallery, which is perfect for art, you are struck by the extraordinary volume of this home. As you immerse yourself into the space you realize that your experiencing something different, something special, 10' ceilings and innumerable large outward facing windows, four exposures, views and streams of sun and light throughout. The gorgeous and dramatic SE facing living room and oversized dining room were designed and intentionally positioned lengthwise along Park Avenue to enhance that light. These rooms span nearly 70' with open views overlooking the historic Armory which was built in 1879. Just off the gallery is a lovely south facing library and an unusual and seductive 7' wide and nearly 48' long corridor which leads you to the secluded private wing and further reveals the unique proportion and expansiveness of this full floor residence, currently 15 rooms, inclusive of 5 bedrooms, 6 baths and two staff rooms. To fully grasp the wonders of this home, it must be experienced.

This boutique cooperative on the NW corner of 66th Street, is one of the select-few truly exclusive and distinguished cooperatives on all of Park Avenue. In close proximity to world class restaurants, shopping, entertainment, art and culture, including the Metropolitan Museum of Art, The Frick Collection, Lincoln Center the list goes on the location is unparalleled. There are full time doormen, a resident manager, and a large storage bin is included. There are no summer work rules and pied-a-terres and 35% financing are permitted. There is a 2.5% flip tax payable by the purchaser.

Features & Amenities

Interior Features

Building Other

Exterior Features

None

Building Amenities

Bike Storage Concierge

Appliances

Washer Dryer Allowed

Building Information

Building Data View Compliance & Permits
Total Units 12
Stories 12
Structure HighRise

Financial Details

Maintenance $21,113/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

603

Median Asking Price

$1.18M

Median $/Sqft

$1,315

Avg Days on Market

N/A

New This Week

21

Price Reduced

38%

Sold (30 Days)

57

Median Sale Price

$1.32M

Live data from RLS at REBNY • Updated 5/4/26, 2:43 PM EST

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Location

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640 PARK Avenue #9THFLOOR, Lenox Hill, New York County

Virtual Tour

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1914
Year Built
112 years old
12
Floors
12
Residential Units
R10
Zoning District
Elevator Apartments Historic District: Upper East Side Historic District

Tax & Assessment

Assessed Value: $11,579,850
Land Value: $1,903,500
Exemptions: $2,290

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

Lot Area: 9,525 SF
Building Area: 95,615 SF
Built FAR: 10.04
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 $21,113 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 5 bedrooms and 6 full bathrooms.

According to MLS records, the building was constructed in 1914, making it approximately 112 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 mcoste@kwnyc.com. 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: RLS20070171
First Listed: 2/3/2026
On Market: 2/3/2026
Price Changed: 2/3/2026
Contract Date: 2/3/2026

Listing Courtesy of Brown Harris Stevens Residential Sales LLC - Lisa Simonsen

Listing Contact: (917) 575-6775

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 5/4/2026 at 6:43 PM UTC

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