Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $5,650,000

· Closed August 15, 2023

639 W END Avenue #10AB
Closed For Sale Co-op

$5,650,000

639 W END Avenue #10AB

Upper West Side, Manhattan

null

MLS® #RLS10878876

RLS at REBNY

Listing by Corcoran Group

4

Bedrooms

4.5

Baths

N/A

Sq. Ft.

1927

Year Built

Quick Summary

Bedrooms 4
Bathrooms 5 full, 1 half
Year Built 1927
Ownership Co-op
Maintenance $7,368/mo
Neighborhood Upper West Side
Floor 10 of 16

Property Highlights

  • Exposure: East,North,South,West facing
  • Style: Prewar architecture
  • Character: Pre-war building (1927)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 9
Baths 4 Full, 1 Half
Floor 10 of 16
Exposure East,North,South,West
Pets Yes
Cross Street WEST 91 STREET and WEST 92 STREET
Year Built 1927
Architectural Style Prewar

Listing History

Event Date Price Change
Listed Mar 6, 2023 $99 -
Price Reduced Aug 16, 2023 $5,950,000 +6010001.0%
Currently May 3, 2026 $5,650,000 -5.0%

Description

Apartment 10AB is a triple mint, sun-filled, custom-designed corner 4 bedroom, 4.5-bath home with an expansive layout fabulous for both entertaining and living. Superbly situated on a high floor with oversized windows, three exposures and a corner primary suite, this approx 3,000 square foot elegant home boasts brilliant natural light and open city views from most rooms. The elegance and scale of prewar architecture was preserved in this huge Upper West Side home that also imbues a modern design utilizing the finest of high-end marble finishes and state-of-the-art systems. A gorgeous full, down to the girder's renovation created a gracious layout with multiple entertaining rooms and a resident's wing hosting 3 bedrooms, each with en-suite bath and a corner primary suite with adjacent library/office on the opposite side.

The stunning, east-facing double living room draws in gorgeous light with four windows, herringbone floors and high-beamed ceilings. In addition, an oversized eat-in, custom chef's kitchen opening to a formal dining room / den-media room. Custom high-end design enhances the prewar scale and details with gorgeous moldings, beamed ceilings, oak floors, custom doors with high-end hardware, pocket doors, and white marble windowsills with custom brass radiator covers. High-end features include multi-zone central AC, Sonos built-in audio speaker system, Lutron lighting, marble spa baths with radiant heat floors, and exceptional custom-fitted closets.

The stunning chefs eat-kitchen with southern open city views is fully outfitted with an extraordinary amount of custom cabinetry, a central island with bar seating, Blue de Savoie hones slab marble counters and backsplash and professional stainless appliances: a 48" Sub Zero refrigerator, Viking 6-burner gas range oven with vented hood, two Miele dishwashers and Viking microwave/convection and a laundry closet with full-size washer and dryer. The formal dining room features a large custom walnut leather dining banquette with seating for at least 12, plenty of room for den/media space and a custom built-in office space, cleverly concealed by custom designed walnut doors with antique mirrors. The generous foyer features two huge double door closets and a separate gallery with an exquisitely designed powder room.

The corner primary suite provides two exposures, both south and east with glorious open city views. This sublime space boasts a full wall of custom closets beautifully appointed with antique mirrored doors and a spa bath bathed in Palisandro slab marble. An adjacent study could easily be suited for the primary suite or can be an informal den/media room with stunning open city views and a custom, built-in cerused oak desk. All three bedrooms in the resident's wing are spacious each with custom closets and marble en-suite baths that include mosaic or chevron patterned Carrara, Calacatta or Glassos marble floors, radiant heat floors, spa showers and a deep-soaking tub in the east-facing bedroom, and high-end fixtures that include Toto, Waterworks and Duravit. Custom built-in desks in two bedrooms.

The pet-friendly building features a beautiful lobby with full-time doorman, and wonderful live-in superintendent. Additional conveniences include bicycle storage, laundry room and private storage.

Features & Amenities

Interior Features

Building Washer Dryer Install Allowed

Appliances

Dryer Dishwasher Washer Dryer Allowed Washer

Building Information

Building null
Building Data View Compliance & Permits
Total Units 61
Stories 16
Style Prewar

Financial Details

Maintenance $7,368/mo
Original Price $99
Sale Price $5,650,000
Previous Price $5,950,000

The Upper West Side (UWS) is celebrated for its cultural richness and architectural grandeur. Set between Central Park and Riverside Park, the neighborhood provides direct access to green space within the urban grid. Residents enjoy easy access to Lincoln Center, the American Museum of Natural History, and a popular culinary scene. The real estate landscape is famous for its historic brownstones and iconic 'white-glove' apartment buildings along Central Park West and Riverside Drive.

Upper West Side Live Market Data

View Neighborhood

Active Listings

579

Median Asking Price

$1.57M

Median $/Sqft

$1,618

Avg Days on Market

N/A

New This Week

32

Price Reduced

27%

Sold (30 Days)

79

Median Sale Price

$1.81M

Live data from RLS at REBNY • Updated 5/3/26, 3:39 PM EST

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Location

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639 W END Avenue #10AB, Upper West Side, New York County • Near WEST 91 STREET and WEST 92 STREET

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1927
Year Built
99 years old
15
Floors
63
Residential Units
R10A
Zoning District
Elevator Apartments Historic District: Riverside-West End Historic District

Tax & Assessment

Assessed Value: $9,184,950
Land Value: $1,071,000
Exemptions: $11,450

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

Lot Area: 6,800 SF
Building Area: 88,396 SF
Built FAR: 13
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 $7,368 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 4 bedrooms and 4 full bathrooms and 1 half bathroom.

According to MLS records, the building was constructed in 1927, making it approximately 99 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.

Pet policy requires confirmation with the listing broker.

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: RLS10878876
First Listed: 3/6/2023
Price Changed: 8/16/2023
Closed: 8/15/2023
Contract Date: 3/6/2023

Listing Courtesy of Corcoran Group - Ileana Lopez-Balboa

Listing Contact: (917) 828-0361

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 5/3/2026 at 7:39 PM UTC

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