15 W 20TH Street #3B
MLS® #RLS10633886
Listing by The Corcoran Group
3
Bedrooms
3
Baths
2,322
Sq. Ft.
1906
Year Built
Quick Summary
Property Highlights
- Climate Control: Central Air
- Character: Pre-war building (1906)
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | May 27, 2020 | $3,200,000 | - |
| Currently | May 19, 2026 | $3,200,000 | - |
Description
Luxurious Flatiron Prewar Condominium Loft. Located right off Fifth Avenue in Flatiron/Chelsea.Enter this 2,322 square foot 3 bedroom, 3 full baths, with 10 foot ceilings, directly from a keyed elevator. The perfect layout, with finishes of the utmost quality. The open entertaining living/dining room, featuring 5 over-sized windows, sits next to the state of the art Valcucine of Italy kitchen, equipped with ribbed aluminum-faced Sub-Zero and Miele appliances, a wine cooler, coffee system, warming drawers, stove-top water faucet and stone countertops. A hallway separates this superb entertaining space from the bedrooms and office. The peaceful master suite features northern and western windows and an enormous master bath luxuriously clad to the ceilings with rare, imported, hand-chosen stones, and adorned with Dornbracht fittings, radiant heated floors, a double sink, a separate standing glass rainfall shower, and a soaking tub replete with a Sony flat screen television. The second bedroom with en-suite bath features a soaking tub. Other luxuries include wide-plank wood floors, customized recessed lighting, 2-zone central air-conditioning, abundant customized closet space and laundry room with side by side washer/dryer. Altair 20 features: private storage units, a La Palestra designed exercise room, a cabana style roof deck with grill, and a part-time doorman. All of this and close proximity to Madison Square Park, Eataly, Trader Joes, the Limelight Marketplace Boutiques and public transportation.
Features & Amenities
Interior Features
Appliances
Building Information
Financial Details
About Flatiron
View All Flatiron ListingsThe Flatiron District is a busy intersection of history, technology, and luxury living. Named after the iconic Flatiron Building, the neighborhood is centered around Madison Square Park and is a hub for the city's 'Silicon Alley.' The real estate market is famous for its grand cast-iron loft buildings with high ceilings and expansive floor plans, alongside ultra-luxury glass towers that offer modern amenities and central Manhattan convenience.
Flatiron Live Market Data
View NeighborhoodActive Listings
138
Median Asking Price
$2.38M
Median $/Sqft
$1,791
Avg Days on Market
N/A
New This Week
10
Price Reduced
31%
Sold (30 Days)
4
Median Sale Price
$1.55M
Live data from RLS at REBNY • Updated 5/18/26, 8:25 PM EST
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Location
15 W 20TH Street #3B, Flatiron, New York County • Near 5 AVENUE and AVENUE OF THE AMERICAS
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 $1,704.55 per month. Confirm the exact amount with the listing broker before making an offer.
The current listed annual property tax is $35,792.52, or roughly $2,983 per month. Verify the current assessment with your attorney before closing.
This property has 3 bedrooms and 3 full bathrooms.
The listed interior living area is 2,322 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 1906, making it approximately 120 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 $3,200,000 for 2,322 sq ft, the asking price per square foot is approximately $1,378. 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 mcoste@kwnyc.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 The Corcoran Group - Claudia Saez-Fromm
Listing Contact: (212) 891-7000
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 5/19/2026 at 12:25 AM UTC