SOLD FOR $1,185,000
Listed at $1,295,000 · Sold 8.5% below asking · Closed October 31, 2025
4 W 21st Street #10D
MLS® #RLS20014968
Listing by Sothebys International Realty
2
Bedrooms
2.5
Baths
1,518
Sq. Ft.
2006
Year Built
Quick Summary
Property Highlights
- Views: City
- Exposure: North,South facing
- Climate Control: Central Air
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Apr 8, 2025 | $1,350,000 | - |
| Currently | May 9, 2026 | $1,295,000 | -4.1% |
Description
Spacious 2-Bed, 2.5-Bath in Prime Flatiron This 1,518+/- SF 2-bedroom, 2.5-bathroom home at 4 West 21st Street offers modern design, abundant light, and top-tier finishes. A gracious entry foyer leads to a sun-drenched great room with floor-to-ceiling windows, electronic shades, and an open chef’s kitchen with Sub-Zero, Miele, Bosch, and Kohler appliances. Both south-facing bedrooms feature en-suite baths and open views. The primary suite includes a large walk-in closet and spa-like bath with heated floors, double vanity, soaking tub, and glass shower. Additional highlights include in-unit laundry, custom window treatments, and hardwood floors. Full-service condop with doorman, fitness center, garage access, and landscaped garden. Pet- and investor-friendly. Close to Madison Sq & Union Sq Parks, dining, shopping, and transit.
Features & Amenities
Interior Features
Exterior Features
Building Amenities
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
134
Median Asking Price
$2.25M
Median $/Sqft
$1,761
Avg Days on Market
N/A
New This Week
14
Price Reduced
31%
Sold (30 Days)
11
Median Sale Price
$2.16M
Live data from RLS at REBNY • Updated 5/9/26, 10:52 AM EST
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Location
4 W 21st Street #10D, Flatiron, 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 monthly maintenance are $6,523 per month. Confirm the exact amount with the listing broker before making an offer.
The current listed annual property tax is $0, or roughly $0 per month. Verify the current assessment with your attorney before closing.
This property has 2 bedrooms and 2 full bathrooms and 1 half bathroom.
The listed interior living area is 1,518 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 co-op (stock cooperative). Buyers purchase shares in a corporation rather than real property, and the board must approve all sales.
Pets are permitted at this property. Contact the listing broker for weight limits or breed restrictions.
At the current list price of $1,295,000 for 1,518 sq ft, the asking price per square foot is approximately $853. 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 - Katherine Salyi
Listing Contact: (212) 431-2440
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 5/9/2026 at 2:52 PM UTC