SOLD FOR $1,500,000
· Closed September 1, 2021
4 W 21ST Street #2D
MLS® #RLS10648612
Listing by Sotheby's International Realty, Inc.
3
Bedrooms
2.5
Baths
1,890
Sq. Ft.
2006
Year Built
Quick Summary
Property Highlights
- Views: City
- Exposure: North,South facing
- Outdoor Space: Building Terrace, Terrace
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Jul 16, 2020 | $2,200,000 | - |
| Currently | May 18, 2026 | $1,500,000 | -31.8% |
Description
With a 270 SF private terrace, 2 bedrooms, a gorgeous home office, and 2.5 bathrooms working from home has never looked so good! Renovated and in excellent condition, apartment 2D offers modern amenities, smart living solutions and a generous layout spanning 1,620 SF. From custom millwork to cove lighting, electronic shades, custom storage solutions and a large private terrace outfitted with water and electric, this home has it all. An inviting foyer welcomes you into this home, with a home office, den, or third bedroom to your left outfitted in custom millwork, sliding pocket doors for privacy, and built-in storage. The large great room is grandly proportioned with an open kitchen, living room and dining area, facing North with excellent light through floor-to-ceiling windows. The stunning, gourmet kitchen is renovated with a waterfall peninsula and breakfast bar, and features Kohler, Sub Zero, Bosch & Miele appliances, a garbage disposal, wine refrigerator and excellent storage. Two South-facing bedrooms overlook the private outdoor oasis of nearly 2760 sf – one of only two in the building (virtually rendered, for inspiration), both bedrooms offering en-suite bathrooms. The primary bedroom has two custom closets, one being a large walk-in, and the spa-like bathroom has heated floors, a double vanity, large soaking tub and glass stall shower. Not to be overlooked are the LV Wood wide-plank oak hardwood floors throughout, a vented W/D, smart-home heating & central A/C with multiple zones, black-out shades & custom window treatments, custom closets and lighting, huge ceiling fans, direct access to an onsite parking garage, and a private entrance to the building's 2,500 SF landscaped outdoor garden complete with a swing set and plenty of seating. 4 West 21st Street offers residents a state-of-the-art fitness center, laundry room, full service staff, 24-hour doorman. Centrally located in Flatiron District just off Fifth Avenue with schools, shopping, fitness centers, restaurants and grocery stores nearby, plus Madison Square Park and Union Square Park blocks away. Condominium rules permit pied-a-terre, sublets, gifting and co-purchasing and is pet friendly.
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
139
Median Asking Price
$2.42M
Median $/Sqft
$1,788
Avg Days on Market
N/A
New This Week
12
Price Reduced
32%
Sold (30 Days)
4
Median Sale Price
$1.55M
Live data from RLS at REBNY • Updated 5/18/26, 2:01 PM EST
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4 W 21ST Street #2D, 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)
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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 $6,593 per month. Confirm the exact amount with the listing broker before making an offer.
This property has 3 bedrooms and 2 full bathrooms and 1 half bathroom.
The listed interior living area is 1,890 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 $1,500,000 for 1,890 sq ft, the asking price per square foot is approximately $794. 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 Sotheby's International Realty, Inc. - 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 5/18/2026 at 6:01 PM UTC