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551 W 21st Street #17A
MLS® #RLS20115545
Listing by Compass
- 4
- Bedrooms
- 4.5
- Baths
- 4,271
- Sq. Ft.
- 2013
- Year Built
Quick Summary
Property Highlights
- Views: River, Skyline
- Exposure: East,North,South,West facing
- Climate Control: Central Air
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Sep 17, 2026 | $17,000,000 | - |
| Currently | Nov 8, 2026 | $17,000,000 | - |
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 |
|---|---|---|---|---|
| Sep 28, 2026 | Unit 4D | 1 BR | $2,100,000 | $1,709 |
| Jun 11, 2026 | Unit 4B | 2 BR | $1,995,000 | $1,625 |
| Sep 26, 2025 | Unit 4-A | 2 BR | $3,850,000 | $1,822 |
Description
Perched high on the 17th floor of Lord Norman Foster's architectural landmark at 551 West 21st Street, 17A is a sprawling 4,271-square-foot corner residence that represents a rare triumph of modern design with urban sophistication. Boasting 11-foot ceilings with some of the tallest proportions offered in the entire building, floor-to-ceiling glass wrap around all four exposures. The home is bathed in glorious natural light from sunrise to sunset. Sweeping 360-degree views stretch across the Hudson River down to the Statue of Liberty, across the glittering expanse of the Midtown skyline, and some of the most notable buildings of downtown Manhattan. Direct private elevator access opens into an intimate gallery entrance, setting a refined tone that continues throughout the home. Foster’s attention to every detail demonstrates an uncompromising commitment to craft, from French oak herringbone floors to luminous bronze window reveals. The expansive 38-foot great room runs along the river, providing an effortless canvas for large-scale entertaining and gracious living. Just off the main living space, a dedicated home office, media room, or den sits behind custom wood shelving, offering quiet seclusion. The custom Molteni kitchen is a masterclass in culinary design, featuring rich oak millwork, Blanco de Macael marble countertops with full slab backsplash, and a generous center island. A fully integrated suite of top-tier appliances includes a Gaggenau vented cooktop, Sub-Zero refrigeration, and Miele coffee and warming systems, complemented by a window dining nook for casual everyday dining. The private bedroom wing comprises four well-appointed en-suite bedrooms. The primary suite is a sanctuary unto itself, offering a dedicated custom dressing room and a spa-like bath appointed with radiant-heated Luna Black granite, a custom Corian vanity, a freestanding soaking tub, and a glass-enclosed shower. Each additional bedroom features a tailored en-suite stone bath, sweeping skyline vistas, and built-in window seating. Discreet yet striking once entering the grounds, 551W21 designed by Foster + Partners, is Lord Norman Foster's first residential project in the United States to evoke serenity and calm in a bustling metropolis. Residents arrive through a private gated motor court with direct access into a 34-foot double-height lobby anchored by a sculptural chandelier. This luxurious building offers a full-time doorman, concierge, porter, and live-in resident manager, alongside a state-of-the-art fitness center with spa, sauna, and steam, a residents' lounge, children's playroom, and bicycle storage. Onsite car valet service for an additional cost is also available. Set in the heart of West Chelsea's Gallery District, with the High Line, Hudson Yards, Hudson River Park, Little Island, Chelsea Market, Faena Hotel, and the Heliport just moments away, this opportunity offers endless ways to live and enjoy all that is great about downtown living. Taxes listed with primary condo tax abatement.
Features & Amenities
Interior Features
Exterior Features
Building Amenities
Appliances
Building Information
Financial Details
About Chelsea
View All Chelsea ListingsChelsea is the epicenter of New York’s contemporary art world and a hub for innovative architecture. Home to the High Line and Chelsea Market, the neighborhood mixes industrial history with modern luxury. The real estate market here is dominated by high-end condominium developments designed by world-renowned architects, alongside historic pre-war lofts and historic townhouses in the Chelsea Historic District.
Chelsea Live Market Data
View NeighborhoodActive Listings
300
Median Asking Price
$1.45M
Median $/Sqft
$1,823
Avg Days on Market
N/A
New This Week
17
Price Reduced
33%
Sold (30 Days)
24
Median Sale Price
$1.70M
Live data from RLS at REBNY • Updated 11/7/26, 11:47 PM EST
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551 W 21st Street #17A, Chelsea, New York County
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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 $10,311 per month. Confirm the exact amount with Milton Coste before making an offer.
The current listed annual property tax is $85,164, or roughly $7,097 per month. Verify the current assessment with your attorney before closing.
This property has 4 bedrooms and 4 full bathrooms and 1 half bathroom.
The listed interior living area is 4,271 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 2013, making it approximately 13 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: Pets Allowed. Contact Milton Coste for weight limits or breed restrictions.
At the current list price of $17,000,000 for 4,271 sq ft, the asking price per square foot is approximately $3,980. 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 Compass - Scott W Hustis
Listing Contact: (646) 679-4075
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 11/8/2026 at 4:47 AM UTC
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Quick Facts
Monthly Costs Estimate
$3,400,000
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 $15M to $19,999,999 at 3.50%, applied to the whole purchase price. It is due in cash at closing and cannot be financed.
Estimated mansion tax at asking
$595,000
Estimate based on the asking price. Confirm your own obligation with your real estate attorney.
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