Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
810 5th Avenue #MAIS

For Sale · Listing by Compass

810 5th Avenue #MAIS

Lenox Hill, Manhattan

$14,995,000

Interested in this property?
Active For Sale Co-op

$14,995,000

810 5th Avenue #MAIS

Lenox Hill, Manhattan

MLS® #RLS20116285

RLS at REBNY

Listing by Compass

5
Bedrooms
6.5
Baths
N/A
Sq. Ft.
1926
Year Built

Quick Summary

Bedrooms 5
Bathrooms 7 full, 1 half
Lot Size 5,445.36 sq ft
Year Built 1926
Ownership Co-op
Maintenance $11,382/mo
Neighborhood Lenox Hill
Floor 1 of 13

Property Highlights

  • Views: Park Greenbelt, See Remarks
  • Exposure: East,North,South,West facing
  • Fireplace: 1 fireplace

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 12
Baths 6 Full, 1 Half
Floor 1 of 13
View Park Greenbelt, See Remarks
Exposure East,North,South,West
Cooling Central Air
Pets Yes
Year Built 1926
Structure Type HighRise
Flooring Carpet, Hardwood, Stone
Furnished Unfurnished
Lot Size 5,445.36 sq ft
Block/Lot 01377/0001

Listing History

Event Date Price Change
Listed Sep 20, 2026 $14,995,000 -
Currently Sep 20, 2026 $14,995,000 -

Description

Introducing the Maisonette at 810 Fifth Avenue (with its own private address at 811 Fifth Avenue), an exceptionally rare duplex residence in one of Manhattan's most distinguished prewar cooperatives. Designed by legendary architect J.E.R. Carpenter, this grand home seamlessly combines the scale and elegance of a Fifth Avenue mansion with the privacy, security, and white-glove service of one of New York's most prestigious addresses. Spanning approximately 5,600+ square feet, the residence offers five bedrooms, six full bathrooms, and one powder room. Exposures to the north, south, east, and west fill the home with natural light throughout the day, highlighting verdant Central Park views. A gracious entry gallery welcomes you into the entertaining level, where beautifully scaled public rooms create an exceptional setting for both intimate gatherings and grand entertaining. The elegant library, formal dining room, and expansive salon each feature classic proportions and timeless architectural character, each with a wood-burning fireplace. The oversized eat-in kitchen is complemented by a charming breakfast room, wine storage, and extensive workspace, creating a functional yet sophisticated heart of the home. The expansive primary suite offers remarkable scale, a wood-burning fireplace, generous closet space, and an oversized en-suite bath. Four additional bedrooms, each well-proportioned and privately situated, are accompanied by multiple full baths, providing exceptional flexibility for family, guests, or staff. Additional highlights include a music room, dedicated laundry room, service entrance, abundant storage, and thoughtful separation between entertaining and private living spaces. Built in 1926 in the Renaissance Palazzo style, 810 Fifth Avenue remains one of Fifth Avenue's most coveted cooperative buildings. Originally conceived by J.E.R. Carpenter as grand full-floor residences, the building has long attracted some of New York's most notable residents, including Nelson Rockefeller and William Randolph Hearst. Residents enjoy unparalleled privacy, exceptional white-glove service, and an iconic location directly across from Central Park, moments from Madison Avenue's luxury boutiques, world-renowned museums, and the city's finest restaurants. A property of this scale, pedigree, and rarity is seldom available. The Maisonette at 810 Fifth Avenue offers an extraordinary opportunity to own one of Fifth Avenue's most distinctive residences.

Features & Amenities

Interior Features

Wet Bar Crown Molding Entrance Foyer Eat In Kitchen High Ceilings Kitchen Island Bar Walk In Closets Building Washer Dryer Install Allowed Common On Floor Common Area In Unit Flooring: Carpet, Hardwood, Stone Fireplace (1)

Exterior Features

Private Entrance Private Outdoor Space Under60 Sqft

Building Amenities

Elevators

Appliances

Double Oven Dryer Dishwasher Gas Cooktop Gas Oven Washer

Building Information

Building Data View Compliance & Permits
Total Units 12
Stories 13
Structure HighRise

Financial Details

Maintenance $11,382/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

585

Median Asking Price

$1.50M

Median $/Sqft

$1,550

Avg Days on Market

N/A

New This Week

47

Price Reduced

27%

Sold (30 Days)

71

Median Sale Price

$1.28M

Live data from RLS at REBNY • Updated 9/20/26, 9:03 AM EST

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Location

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810 5th Avenue #MAIS, Lenox Hill, New York County

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1926
Year Built
100 years old
13
Floors
12
Residential Units
R10
Zoning District
Elevator Apartments Historic District: Upper East Side Historic District

Tax & Assessment

Assessed Value: $9,632,250
Land Value: $1,444,500
Exemptions: $0

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

Lot Area: 5,445 SF
Building Area: 67,465 SF
Built FAR: 12.39
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 $11,382 per month. Confirm the exact amount with Milton Coste before making an offer.

The current listed annual property tax is $0, or roughly $0 per month. Verify the current assessment with your attorney before closing.

This property has 5 bedrooms and 6 full bathrooms and 1 half bathroom.

According to MLS records, the building was constructed in 1926, making it approximately 100 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 Milton Coste.

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: RLS20116285
First Listed: 9/19/2026
On Market: 9/20/2026
Price Changed: 9/19/2026
Contract Date: 9/21/2026

Listing Courtesy of Compass - THOMAS POSTILIO

Listing Contact: (917) 543-0005

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 9/20/2026 at 1:03 PM UTC

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Lenox Hill Market Update

71 sales last 30 days · $1.50M median · 8.2 months supply

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New listings in this neighborhood

Quick Facts

Status Active Type Co-op Neighborhood Lenox Hill Borough Manhattan
County New York
Floor 1 of 13
Year Built 1926
First Listed 9/19/2026
Maintenance $11,382/mo

Monthly Costs Estimate

Down Payment 20%

$2,999,000

Interest Rate Loading...

Source: Freddie Mac PMMS

Loan Term 30 years

Est. Monthly Payment

$0

Principal & Interest $0
PMI (under 20% down) $0
Maintenance $11,382
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

$487,338

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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