For Sale · Listing by Compass
810 5th Avenue #MAIS
Lenox Hill, Manhattan
$14,995,000
810 5th Avenue #MAIS
MLS® #RLS20116285
Listing by Compass
- 5
- Bedrooms
- 6.5
- Baths
- N/A
- Sq. Ft.
- 1926
- Year Built
Quick Summary
Property Highlights
- Views: Park Greenbelt, See Remarks
- Exposure: East,North,South,West facing
- Fireplace: 1 fireplace
Property Details
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
Exterior Features
Building Amenities
Appliances
Building Information
Financial Details
About Lenox Hill
View All Lenox Hill ListingsLenox 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 NeighborhoodActive Listings
585
Median Asking Price
$1.50M
Median $/Sqft
$1,570
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, 2:20 AM EST
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Location
810 5th Avenue #MAIS, Lenox Hill, New York County
Floor Plans
Building Information
Official NYC property records for this building
Tax & Assessment
Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.
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
Listing Data
RLS® at REBNY (Real Estate Board of New York) via Trestle API. Updated in real-time.
Building Data
NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning. Updated quarterly.
Market Data
RLS® at REBNY (Real Estate Board of New York). Live data updated in real-time.
Map & Location
OpenStreetMap contributors via Leaflet. Geocoding via Nominatim.
All data is provided for informational purposes only and should be independently verified. See our Data Sources Policy for more information.
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 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) 416-7433Listing 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 Data display by Keller Williams NYC. Data last updated on 9/20/2026 at 6:20 AM UTC
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Quick Facts
Monthly Costs Estimate
$2,999,000
Source: Freddie Mac PMMS
Est. Monthly Payment
$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
Estimate based on the asking price. Confirm your own obligation with your real estate attorney.
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