SOLD FOR $1,200,000
· Closed December 15, 2021
4 W 21st Street #10-C
MLS® #RLS10708900
Listing by Compass
2
Bedrooms
2
Baths
1,073
Sq. Ft.
2006
Year Built
Quick Summary
Property Highlights
- Views: City
- Exposure: North facing
- Climate Control: Central Air
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Apr 5, 2021 | $1,200,000 | - |
| Currently | May 18, 2026 | $1,200,000 | - |
Description
Welcome to 10C at 4W21, a sleek, spacious 1 bedroom (convertible 2) 2 bathroom apartment in the heart of the Flatiron District. Enjoy full-service luxury living in a spectacular building and premier location, met by impeccably-designed modern interiors. The layout is generous and airy, enriched by wide-plank oak wood floors, a fabulous wall of custom built-ins, chic dcor and refined finishes throughout. An open living and dining room is a perfect backdrop for relaxing and entertaining, accompanied by a stunning modern open kitchen. Chef's quarters are well-appointed with Varenna cabinetry and high-end Sub-Zero & Miele appliances. The entire ambience is bathed in light and enhanced by fabulous city and Empire State Building views framed by floor-to-ceiling windows. A gracious entry foyer centers the 1,073 sq ft home, with a private door to the left leading into the sun-filled primary bedroom suite. A wall lined with massive closets and an elegant 5-fixture spa bath featuring a dual-sink vanity, oversized shower, soaking tub, window wall and heated floors enhance the experience. Versatile living space allows for the creation of an additional bedroom if desired. Down the hall is a beautiful secondary full bath and a convenient washer-dryer. A Nest system provides state-of-the-art control of smart home features and central air. Built in 2006, 4 West 21st Street is a striking full-service condominium of glass and steel conceived by famed architect Hugh Hardy, with interiors by Anthony Todd. The building offers full condo rules and allows pets, subletting, co-purchasing and pied-a-terres. A full-time doorman, live-in super, onsite parking garage, fully-equipped gym, and landscaped private garden terrace optimize the attractive lifestyle. Ideally located near Madison Square Park, Union Square Park and greenmarket, Eataly, abundant restaurants, shopping and subway transportation.
Features & Amenities
Interior Features
Exterior 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
11
Price Reduced
32%
Sold (30 Days)
4
Median Sale Price
$1.55M
Live data from RLS at REBNY • Updated 5/18/26, 11:19 AM EST
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Location
4 W 21st Street #10-C, Flatiron, New York County • Near Fifth Avenue/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 $3,865 per month. Confirm the exact amount with the listing broker before making an offer.
This property has 2 bedrooms and 2 full bathrooms.
The listed interior living area is 1,073 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 2006, making it approximately 20 years old.
This listing is a condop, a hybrid structure where the building is legally a co-op but individual units are sold with greater flexibility, often including subletting rights similar to condos.
Pets are permitted at this property. Contact the listing broker for weight limits or breed restrictions.
At the current list price of $1,200,000 for 1,073 sq ft, the asking price per square foot is approximately $1,118. 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 Compass - Arielle D'Adamo
Listing Contact: (845) 656-0850
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 5/18/2026 at 3:19 PM UTC