Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $9,000,000

· Closed September 15, 2023

812 PARK Avenue #9/10B
Closed For Sale Co-op

$9,000,000

812 PARK Avenue #9/10B

Upper East Side, Manhattan

MLS® #RLS10888510

RLS at REBNY

Listing by Sotheby's International Realty, Inc.

4

Bedrooms

4.5

Baths

N/A

Sq. Ft.

1958

Year Built

Quick Summary

Bedrooms 4
Bathrooms 5 full, 2 half
Lot Size 14,050 sq ft
Year Built 1958
Ownership Co-op
Maintenance $11,720/mo
Neighborhood Upper East Side
Floor 9 of 14

Property Highlights

  • Views: City
  • Exposure: East,North facing
  • Fireplace: Wood-burning or decorative fireplace

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 10
Baths 4 Full, 2 Half
Floor 9 of 14
View City
Exposure East,North
Pets Yes
Year Built 1958
Architectural Style Prewar
Lot Size 14,050 sq ft

Listing History

Event Date Price Change
Listed Apr 12, 2022 $11,500,000 -
Price Reduced Sep 15, 2023 $10,000,000 -13.0%
Currently May 2, 2026 $9,000,000 -10.0%

Description

This 10-room high floor corner duplex at 812 Park Avenue is absolute perfection. Each and every room faces either onto Park Avenue or picturesque 75th St, so the light is divine. Equally mesmerizing is the gorgeous sweeping staircase in the Gallery that distinguishes the apartments in this esteemed building. The entertaining rooms radiate off of the Gallery and include a supremely elegant Living Room with two exposures and a wood burning fireplace. There is also a handsome Library and a marvelous almost square-shaped Dining Room. In addition, the lower floor of the residence has a fantastic updated kitchen that overlooks the townhouses to the north and the iconic Carlyle. Plus, there is a Powder Room. Upstairs there are three lovely principal Bedrooms, all with en-suite baths and abundant closets. Of note, the Master wraps the corner and boasts double exposures which insures not only extra special light, but a rare sense of openness. Two of the three staff rooms with bath have been beautifully converted to create a perfect fourth Bedroom suite. Impeccably maintained under the thoughtful stewardship of the current owner, this apartment is fortunate to maintain many of the original details that are associated with the esteemed work of J.E.R Carpenter. Designed both for everyday living and for grand formal entertaining, the understated and timeless elegance of this almost house- like residence is certainly delightful. Designed by the legendary architect J.E.R Carpenter in 1927, 812 Park Avenue is one of Park Avenue's most prestigious cooperatives. Located in the prime of Lenox Hill on the west side of Park Avenue between 74th and 75th this white glove cooperative features a very pretty planted Garden Courtyard; a state-of-the-art gym and private storage is available. 30% financing permitted, there is a 2% flip tax (payable by purchaser), pets are permitted, and there are summer work rules (May 15th through September 30th).

Features & Amenities

Interior Features

Den Separate Formal Dining Room Entrance Foyer Building Washer Dryer Install Allowed Common Area Fireplace

Exterior Features

Building Garden Garden

Appliances

Dryer Washer Dryer Allowed Washer

Building Information

Building Data View Compliance & Permits
Total Units 42
Stories 14
Style Prewar

Financial Details

Maintenance $11,720/mo
Original Price $11,500,000
Sale Price $9,000,000
Previous Price $10,000,000

The Upper East Side remains the gold standard for classic New York elegance. Known for 'Museum Mile' and its low-traffic, tree-lined streets, the neighborhood offers a refined lifestyle away from the midtown bustle. While famous for its historic cooperatives, the area has seen a recent surge in ultra-luxury new construction condos, particularly along the Second Avenue Subway corridor, making it a top choice for both traditionalists and modern buyers.

Upper East Side Live Market Data

View Neighborhood

Active Listings

339

Median Asking Price

$1.67M

Median $/Sqft

$1,536

Avg Days on Market

N/A

New This Week

29

Price Reduced

28%

Sold (30 Days)

37

Median Sale Price

$1.52M

Live data from RLS at REBNY • Updated 5/2/26, 5:05 AM EST

Similar Listings in Upper East Side

View All

Location

Loading map...

812 PARK Avenue #9/10B, Upper East Side, New York County

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1958
Year Built
68 years old
14
Floors
42
Residential Units
R10
Zoning District
Elevator Apartments Historic District: Upper East Side Historic District

Tax & Assessment

Assessed Value: $20,407,500
Land Value: $4,464,000
Exemptions: $2,290

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

Lot Area: 14,050 SF
Building Area: 154,827 SF
Built FAR: 11.02
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 $11,720 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 4 bedrooms and 4 full bathrooms and 2 half bathrooms.

According to MLS records, the building was constructed in 1958, making it approximately 68 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: RLS10888510
First Listed: 4/12/2022
Price Changed: 9/15/2023
Closed: 9/15/2023
Contract Date: 4/12/2022

Listing Courtesy of Sotheby's International Realty, Inc. - Serena Boardman

Listing Contact: (212) 606-7611

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 5/2/2026 at 9:05 AM UTC

Buying a Co-op? Start Here

Co-op vs. Condo: Which Is Right for You?

Ownership structure, board approval, financing: the full comparison.

Read article

How to Ace Your Co-op Board Interview

What boards look for, common questions, and how to prepare.

Read article

HDFC Co-ops: Complete Guide

Income limits, resale caps, and how to qualify for affordable co-ops.

Read article

NYC Mansion Tax: 2026 Guide

How the tiered mansion tax works for purchases over $1M.

Read article

Interested in this property?

Your info is secure and never shared.

View Active Listings Call Milton