For Sale · Listing by Sothebys International Realty
823 Park Avenue #4
Lenox Hill, Manhattan
$12,750,000
823 Park Avenue #4
MLS® #RLS20046136
Listing by Sothebys International Realty
- 5
- Bedrooms
- 4.5
- Baths
- 4,184
- Sq. Ft.
- 1911
- Year Built
Quick Summary
Property Highlights
- Views: City, Skyline
- Exposure: East,West facing
- Fireplace: 1 fireplace
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Sep 4, 2025 | $12,750,000 | - |
| Currently | Nov 2, 2026 | $12,750,000 | - |
Recent Sales in This Building
What other apartments here closed for in the last three years, as reported to the REBNY Listing Service (RLS).
| Closed | Unit | Beds | Sold For | Per Sq Ft |
|---|---|---|---|---|
| Dec 18, 2025 | Unit PH | 5 BR | $24,200,000 | $3,361 |
| Apr 24, 2025 | Unit 7THFL | 5 BR | $10,750,000 | $2,560 |
Description
Please note: Showings are Monday through Friday, 1:30-4:30PM. A minimum of 36 hours’ notice is requested. Ideally located on Park Avenue at East 75th Street, this rare and delightful pre-war condominium is defined by its leafy outlooks, generous and elegant entertainment rooms, and thoughtful layout. From a private elevator landing, the Foyer opens into a sweeping Living Room and Library that face west over Park Avenue. These impressive rooms open to one another and are anchored at each end by a gas fireplace. Nearby, there is a handsome Dining Room, currently configured as a Den. Beyond, a bright fully-equipped chef’s Eat-in Kitchen is impeccably renovated in a classic and inviting style with custom cabinets, a panoply of state-of-the-art appliances, gray marble countertops and backsplashes, and very ample storage. A stylish Powder Room completes the very welcoming and generous entertainment rooms in this very chic and pleasant home. Private quarters are serene and pretty. The spacious Primary Bedroom Suite, with abundant closets including a generous dressing closet, and a large marble-clad Bathroom featuring Waterworks fixtures and radiant heated floors. There are four additional Bedrooms and three Baths, two of which are ensuite, as well as very ample closets. Throughout, there are thoughtful and attractive details, as well as the hallmarks of coveted pre-war design, such as herringbone oak floors, 10’ ceilings, a vented laundry room, central air conditioning, and Crestron entertainment system. Built in 1912 and converted to a condominium in 2006, with an extensive renovation by design firm Pickering and Walker, 823 Park Avenue consists of all full-floor residences in an ideal and sought-after location. Residents in this boutique, white glove building benefit from excellent service, with full-time doormen and a live-in resident manager, as well as a fully equipped health club and private storage. Pets are welcome.
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
653
Median Asking Price
$1.27M
Median $/Sqft
$1,494
Avg Days on Market
N/A
New This Week
11
Price Reduced
33%
Sold (30 Days)
60
Median Sale Price
$1.35M
Live data from RLS at REBNY • Updated 11/2/26, 9:43 AM EST
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Location
823 Park Avenue #4, 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 common charges are $9,973 per month. Confirm the exact amount with Milton Coste before making an offer.
The current listed annual property tax is $59,568, or roughly $4,964 per month. Verify the current assessment with your attorney before closing.
This property has 5 bedrooms and 4 full bathrooms and 1 half bathroom.
The listed interior living area is 4,184 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 1911, making it approximately 115 years old.
This listing is a condominium. Buyers receive a deed to their individual unit and own their space outright, subject to condo association rules.
Pets are permitted at this property: UnitYes. Contact Milton Coste for weight limits or breed restrictions.
At the current list price of $12,750,000 for 4,184 sq ft, the asking price per square foot is approximately $3,047. This figure is for reference only and may differ from appraised or assessed values.
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) 416-7433Listing 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.
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 Data display by Keller Williams NYC. Data last updated on 11/2/2026 at 2:43 PM UTC
See it in person
Sale history, taxes, violations and comps for this unit
Before you bid
Pre-Offer Report: 823 Park Avenue #4
At $12,750,000, 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. No obligation.
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What happens next
- 1Milton emails you today.
- 2A short call about what you want and when.
- 3The agreement arrives electronically after the call. Then showings.
Your info is secure and never shared.
You're contacting Milton Coste, a buyer's agent. Before any private showing, New York brokerage rules require a short non-exclusive agreement. Milton walks you through it before you sign anything. Broker commissions are not set by law and are fully negotiable. How working together works.
Lenox Hill Market Update
60 sales last 30 days · $1.27M median · 10.9 months supply
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Quick Facts
Monthly Costs Estimate
$2,550,000
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
$414,375
Estimate based on the asking price. Confirm your own obligation with your real estate attorney.
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