521 Park Avenue #10C
MLS® #RLS20090259
Listing by Sothebys International Realty
2
Bedrooms
2
Baths
1,683
Sq. Ft.
1911
Year Built
Quick Summary
Property Highlights
- Views: City, Park Greenbelt
- Exposure: South,West facing
- Outdoor Space: Balcony
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | May 11, 2026 | $2,750,000 | - |
| Currently | May 11, 2026 | $2,750,000 | - |
Description
Experience classic Park Avenue living in this elegant corner two-bedroom, two-bath residence, offering approximately 1,683+/- square feet within one of Park Avenue’s most distinguished pre-war condominiums. Flooded with natural light from oversized windows on three exposures, the home enjoys sweeping views along Park Avenue and to Central Park. It is defined by soaring 10.5-foot ceilings that enhance the sense of space throughout. The living room is particularly well-proportioned—nearly square in layout—making it exceptionally easy to furnish and flexible for a variety of seating and entertaining arrangements. A decorative fireplace, set along a short dividing wall between the living and dining rooms, creates a natural separation while maintaining an easy, comfortable flow between the spaces. A formal dining room or used as a separate den provide excellent versatility, whether for entertaining, working from home, or quiet relaxation. The windowed kitchen is thoughtfully designed with granite countertops, abundant cabinetry, and premium appliances including Sub-Zero and Miele. The primary suite is bright and tranquil, featuring oversized south-facing windows, two generous walk-in closets, and a marble en-suite bath with double vanity and glass-enclosed shower. The second bedroom is equally well-sized, with its own walk-in closet and easy access to a full bath. A gracious gallery connects the public and private spaces, adding to the home’s sense of scale and arrival. Residents of 521 Park Avenue enjoy full-service living with a 24-hour doorman, live-in resident manager, fitness center, and private storage. The building is pet-friendly, permits pied-à-terres, and offers flexible financing. Designed by William Alciphron Boring and completed in 1911, 521 Park Avenue is a notable example of early cooperative living on Park Avenue. Boring, who trained at the École des Beaux-Arts and co-designed Ellis Island Immigration Station, brought a refined architectural sensibility to the building. Originally composed of full-floor residences, the building now contains a boutique collection of just 27 homes. This is a rare opportunity to own a spacious, light-filled residence that combines pre-war character, practical layout, and the enduring appeal of Park Avenue.
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
627
Median Asking Price
$1.27M
Median $/Sqft
$1,320
Avg Days on Market
N/A
New This Week
30
Price Reduced
33%
Sold (30 Days)
62
Median Sale Price
$1.35M
Live data from RLS at REBNY • Updated 5/11/26, 2:21 PM EST
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Location
521 Park Avenue #10C, 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)
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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 $4,639 per month. Confirm the exact amount with the listing broker before making an offer.
The current listed annual property tax is $37,020, or roughly $3,085 per month. Verify the current assessment with your attorney before closing.
This property has 2 bedrooms and 2 full bathrooms.
The listed interior living area is 1,683 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. Contact the listing broker for weight limits or breed restrictions.
At the current list price of $2,750,000 for 1,683 sq ft, the asking price per square foot is approximately $1,634. 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 - Glenn J Norrgard
Listing Contact: (917) 822-6840
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 5/11/2026 at 6:21 PM UTC