For Sale · Listing by Sothebys International Realty
834 5th Avenue #MAIS-C
Lenox Hill, Manhattan
$14,995,000
834 5th Avenue #MAIS-C
MLS® #RLS20118309
Listing by Sothebys International Realty
- 6
- Bedrooms
- 4.5
- Baths
- N/A
- Sq. Ft.
- 1931
- Year Built
Quick Summary
Property Highlights
- Views: City, Skyline
- Exposure: East,North,West facing
- Fireplace: 1 fireplace
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Sep 30, 2026 | $14,995,000 | - |
| Currently | Oct 1, 2026 | $14,995,000 | - |
Description
There exists but a very limited number of grand duplex maisonette apartments in Fifth Avenue’s finest buildings. This glorious and glamorous maisonette is such a rarity. Located at 834 Fifth Avenue, among the Upper East Side’s most coveted addresses, and designed by master architect, Rosario Candela, this residence is truly splendid. Blessed with pleasing scale, soaring high ceilings, elegant proportions, and delightfully sun-flooded interiors, this duplex offers the discretion and privacy of a fine townhouse as well as the security and service provided by a building of this caliber. Notably in this divine apartment, every major room of this duplex faces onto Fifth Avenue and offers delightful treeline outlooks of Central Park. The apartment features two entrances, one from each floor of the building’s interior, the other its own private entrance (and address) on Fifth Avenue. A separate service entrance through the building ensures that deliveries are discreetly managed and escorted by the building’s back-of-house staff. From its private Fifth Avenue entrance, the classic and very grand Gallery has an attractive stone floor and is anchored by a gracefully curving staircase. Coat closets and a powder room are conveniently accessible. The Gallery opens to two entertainment rooms, both overlooking Fifth Avenue: a sumptuous, wood-paneled Library with a woodburning fireplace, and an elegant Dining Room. Beyond, a large eat-in Kitchen, designed for the consummate chef, is perfect for extremely comfortable daily life but also scaled to accommodate a large catering crew and chef when for grand entertaining. Above, the second floor presents a magnificently-scaled step-down Living Room with a wood burning fireplace and marvelous oversized windows looking onto Central Park. On this level, there are also three large Bedrooms, two of which stretch along Fifth Avenue with leafy outlooks. Each has an ensuite bath and a copious dressing closet. A third very generously-scaled Bedroom is nearby and also has an ensuite bath and ample closets. Beyond, there are three staff bedrooms- two of which could easily be combined to create a large fourth Bedroom. A large storage bin, a private basement laundry room, and a wine vault are also included. Designed by the esteemed Rosario Candela in 1931, 834 Fifth Avenue is notable for its restrained and elegant neoclassical limestone façade. Representing the highest standard in refined and luxury living, this stately building was constructed to include a preponderance of duplexes along with a penthouse triplex and three duplex maisonettes. Impeccable staffing at this white-glove cooperative include a fully attended lobby, with a full-time doormen, porters, and elevator attendants, and residents benefit from a well-appointed and recently renovated fitness suite. There is a 3% flip tax payable by the purchaser, and financing is not permitted. Pets are welcome. This listing is a co-exclusive.
Features & Amenities
Interior 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
657
Median Asking Price
$1.20M
Median $/Sqft
$1,475
Avg Days on Market
N/A
New This Week
33
Price Reduced
29%
Sold (30 Days)
75
Median Sale Price
$1.24M
Live data from RLS at REBNY • Updated 9/30/26, 8:40 PM EST
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Location
834 5th Avenue #MAIS-C, 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 $14,376 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 6 bedrooms and 4 full bathrooms and 2 half bathrooms.
According to MLS records, the building was constructed in 1931, making it approximately 95 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: UnitYes. 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) 416-7433Listing Courtesy of Sothebys International Realty - 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 Data display by Keller Williams NYC. Data last updated on 10/1/2026 at 12:40 AM UTC
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Sale history, taxes, violations and comps for this unit
Before you bid
Pre-Offer Report: 834 5th Avenue #MAIS-C
At $14,995,000, the listing leaves out what decides the offer: the recorded sale history, the tax and abatement picture, open building violations and permits, and the closed sales that set the price. Milton prepares the report from public records. Free, no obligation.
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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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