Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
812 PARK Avenue #11/12B

For Sale · Listing by Corcoran Group

812 PARK Avenue #11/12B

Lenox Hill, Manhattan

$10,250,000

Interested in this property?
Active For Sale • Co-op

$10,250,000

812 PARK Avenue #11/12B

Lenox Hill, Manhattan

MLS® #RLS20120389

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, 2 half
Year Built 1927
Ownership Co-op
Maintenance $12,743/mo
Neighborhood Lenox Hill
Floor 11 of 14

Property Highlights

  • Views: City
  • Exposure: East,North facing
  • Fireplace: 2 fireplaces

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 10
Baths 4 Full, 2 Half
Floor 11 of 14
View City
Exposure East,North
Pets Yes
Year Built 1927
Structure Type HighRise
Basement Other
Block/Lot 01389/0038

Listing History

Event Date Price Change
Listed Oct 11, 2026 $10,250,000 -
Currently Oct 12, 2026 $10,250,000 -

Description

Perfectly located on the 11th and 12th floors of 812 Park Avenue, this extraordinary corner prewar duplex in a distinguished J.E.R. Carpenter-designed co-operative is flooded with natural light, with every window facing either Park Avenue or picturesque 75th Street. This magnificent 11-into-10-room residence offers four bedrooms, four full bathrooms, two powder rooms, grand entertaining rooms, ceilings reaching up to 10'6", and an abundance of original architectural details, including a spectacular sweeping staircase, herringbone hardwood floors, beautiful moldings, and original doors. A gracious entrance gallery with an oversized coat closet is distinguished by the magnificent original staircase that connects the two floors. The elegant corner living room spans 29'6" in length and faces east over Park Avenue and north over 75th Street, with four oversized windows, beautiful herringbone floors, and a wood-burning fireplace. Adjacent to the living room is a handsome walnut-paneled library with two windows overlooking Park Avenue. The generously proportioned formal dining room is perfectly suited for grand-scale entertaining. Also off the gallery is a windowed powder room and a wet bar equipped with a sink and refrigerator. The expansive windowed eat-in kitchen features three north-facing windows overlooking the neighboring townhouses and the iconic Carlyle Hotel. There is a breakfast room, pantry, and silver closet, providing wonderful space for everyday living and entertaining. A separate back staircase provides convenient access from the kitchen to the upper floor. The beautiful original staircase leads to the private bedroom quarters on the upper level. The luxurious primary bedroom suite faces east over Park Avenue and features two oversized windows, a wood-burning fireplace, a dressing room, and an additional closet. An additional north-facing window, currently concealed, offers the opportunity to be reopened, bringing even more natural light into the room and creating a corner bedroom with exposures to the east and north. The windowed en-suite bathroom is appointed with two sinks, a bathtub, and a separate shower. The second bedroom also faces east over Park Avenue and has a large closet and a windowed en-suite bathroom with a bathtub. The third bedroom is generously proportioned and features a large closet and a windowed en-suite bathroom with a bathtub. The fourth bedroom faces north over picturesque 75th Street and has ample closets and a windowed en-suite bathroom with a bathtub. Completing this floor are a powder room, laundry area, two linen closets, and additional storage closets. Impeccably maintained, this exceptional residence retains many of its exquisite original architectural details. With its grand entertaining rooms, gracious proportions, beautiful natural light, and wonderful separation between the entertaining and bedroom quarters, this extraordinary duplex offers the elegance of a grand prewar residence with the comfort of a private home. Ideally situated on the southwest corner of Park Avenue and 75th Street, 812 Park Avenue is a distinguished prewar cooperative with full-time doormen, a live-in resident manager, a fitness center located on the first floor, and a beautifully landscaped central courtyard garden. Pets are permitted, and summer work rules apply from May 15th through October 15th. The building permits up to 30% financing, and there is a 2% flip tax payable by the purchaser.

Features & Amenities

Interior Features

Separate Formal Dining Room High Ceilings Walk In Closets Building Other Washer Hookup In Unit Fireplace (2)

Exterior Features

None

Building Amenities

Bike Storage Cold Storage Storage

Appliances

Washer Dryer Allowed

Building Information

Building Data View Compliance & Permits
Total Units 42
Stories 14
Structure HighRise

Financial Details

Maintenance $12,743/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

684

Median Asking Price

$1.06M

Median $/Sqft

$1,332

Avg Days on Market

N/A

New This Week

19

Price Reduced

29%

Sold (30 Days)

86

Median Sale Price

$1.27M

Live data from RLS at REBNY • Updated 10/12/26, 9:24 AM EST

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Location

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812 PARK Avenue #11/12B, Lenox Hill, 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: $0

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 $12,743 per month. Confirm the exact amount with Milton Coste 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 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.

Pets are permitted at this property: Pets Allowed,Building Pets Allowed Comments:Pets Allowed. Contact Milton Coste for weight limits or breed restrictions.

To schedule a private showing, contact Milton Coste at (917) 416-7433 or milton@miltoncoste.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: RLS20120389
First Listed: 10/11/2026
On Market: 10/11/2026
Price Changed: 10/11/2026
Contract Date: 10/11/2026

Listing Courtesy of Corcoran Group - Cathy F Franklin

Listing Contact: (917) 863-8209

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.

How working with a buyer's agent works: I work for you, not the seller. Before I show you anything, New York brokerage rules ask us to put that in writing: an agreement and a disclosure that say I work for you and negotiate on your behalf. The agreement is non-exclusive: you can work with other agents, it runs for a short fixed term we agree on, and you can end it with a note. You may attend open houses independently without an agreement. Read how it works

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 10/12/2026 at 1:24 PM UTC

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Milton Coste - NYC Real Estate Broker

Milton Coste

Licensed Real Estate Associate Broker

Keller Williams NYC

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Sale history, taxes, violations and comps for this unit

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Lenox Hill Market Update

86 sales last 30 days · $1.06M median · 8 months supply

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Quick Facts

Status Active Type Co-op Neighborhood Lenox Hill Borough Manhattan
County New York
Floor 11 of 14
Year Built 1927
First Listed 10/11/2026
Maintenance $12,743/mo

Monthly Costs Estimate

Down Payment 20%

$2,050,000

Interest Rate Loading...

Source: Freddie Mac PMMS

Loan Term 30 years

Est. Monthly Payment

$0

Principal & Interest $0
PMI (under 20% down) $0
Maintenance $12,743
Total Monthly $0

Estimates only. Consult a lender for exact figures.

Mansion tax applies at this price point

New York State charges the buyer a mansion tax on residential purchases at $1,000,000 or more. At this asking price the tier is $10M to $14,999,999 at 3.25%, applied to the whole purchase price. It is due in cash at closing and cannot be financed.

Estimated mansion tax at asking

$333,125

Run the numbers on a different offer price

Estimate based on the asking price. Confirm your own obligation with your real estate attorney.

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