Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
863 PARK Avenue #9W
Interested in this property?
Active For Sale Co-op

$2,495,000

863 PARK Avenue #9W

Lenox Hill, Manhattan

863 Park Avenue Inc.

MLS® #RLS20090979

RLS at REBNY

Listing by Brown Harris Stevens Residential Sales LLC

3

Bedrooms

2.5

Baths

N/A

Sq. Ft.

1909

Year Built

Quick Summary

Bedrooms 3
Bathrooms 3 full, 1 half
Year Built 1909
Ownership Co-op
Maintenance $6,023/mo
Neighborhood Lenox Hill
Floor 9 of 12

Property Highlights

  • Climate Control: Central Air
  • Character: Pre-war building (1909)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 5
Baths 2 Full, 1 Half
Floor 9 of 12
Cooling Central Air
Pets Yes
Year Built 1909
Structure Type HighRise
Basement Other
Parcel # 1412-0001-00863-000-000009W
Block/Lot 01412/0001

Listing History

Event Date Price Change
Listed May 13, 2026 $2,495,000 -
Currently May 13, 2026 $2,495,000 -

Description

Sun-Filled Prewar 3BR with Juliet Balcony on Park Avenue

Bathed in beautiful southern and western light, Apartment 9W is an elegant 3-bedroom, 2.5-bath prewar residence offering classic proportions, gracious entertaining spaces, and a charming Juliet balcony overlooking the Park Avenue Esplanade.

Accessed via a semi-private landing, the home opens into a welcoming foyer and central gallery that set the tone for the residence's timeless character. Nearly 10-foot ceilings, oversized windows, hardwood floors, and refined architectural details create a warm and sophisticated atmosphere throughout.

The expansive corner living room is flooded with sunlight from multiple exposures and features a wood-burning fireplace and access to a lovely Juliet balcony - a rare and inviting feature that brings in fresh air and greenery from Park Avenue below. Adjacent to the living room, the generously scaled formal dining room offers an ideal setting for both everyday living and entertaining.

The thoughtfully designed kitchen features excellent storage and workspace, stainless steel appliances, and an in-unit washer/dryer.

Privately situated away from the entertaining rooms, the bedroom wing offers a comfortable and functional layout. The primary bedroom enjoys beautiful light, generous closet space including a walk-in closet, and an en-suite bath. A second well-proportioned bedroom sits nearby, while the third bedroom is ideal as a guest room, nursery, or home office.

Built in 1908 and designed by Pollard & Steinam, 863 Park Avenue was the first residential building constructed on Park Avenue above 57th Street. With only 25 residences and two apartments per floor, the cooperative offers an intimate and distinctive old-world ambiance rarely found today. Amenities include a full-time elevator operator, resident manager, bicycle room, laundry room, and private storage cage that transfers with the apartment.

Perfectly positioned moments from The Carlyle, The Mark, Sant Ambroeus, Madison Avenue boutiques and restaurants, world-class museums, top schools, and Central Park, Apartment 9W offers quintessential Upper East Side living.

The building is pet friendly, permits pieds-à-terre, allows up to 50% financing, and there is a 3% flip tax.

Please note there is an ongoing assessment of $406.26/month through October 2029 to replenish the building's reserve fund.

Features & Amenities

Interior Features

Building Other

Exterior Features

None

Building Amenities

Elevators

Appliances

Washer Dryer Allowed

Building Information

Financial Details

Maintenance $6,023/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

638

Median Asking Price

$1.75M

Median $/Sqft

$1,443

Avg Days on Market

N/A

New This Week

41

Price Reduced

38%

Sold (30 Days)

66

Median Sale Price

$1.40M

Live data from RLS at REBNY • Updated 5/13/26, 4:31 PM EST

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Location

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863 PARK Avenue #9W, Lenox Hill, New York County

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1908
Year Built
118 years old
12
Floors
23
Residential Units
R10
Zoning District
Elevator Apartments Historic District: Upper East Side Historic District

Tax & Assessment

Assessed Value: $6,820,650
Land Value: $1,665,000
Exemptions: $4,580

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

Lot Area: 5,116 SF
Building Area: 55,758 SF
Built FAR: 10.9
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 $6,023 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 3 bedrooms and 2 full bathrooms and 1 half bathroom.

According to MLS records, the building was constructed in 1909, making it approximately 117 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: Pets Allowed With Board Approval.,Building Pets Allowed Comments:Pets Allowed With Board Approval.. 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: RLS20090979
First Listed: 5/13/2026
On Market: 5/13/2026
Price Changed: 5/13/2026
Contract Date: 5/13/2026

Listing Courtesy of Brown Harris Stevens Residential Sales LLC - Christopher E Kromer

Listing Contact: (212) 381-2334

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 5/13/2026 at 8:31 PM UTC

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