4 W 21ST Street #3B
MLS® #RLS10083276
Listing by Brown Harris Stevens Residential Sales LLC
2
Bedrooms
3
Baths
1,475
Sq. Ft.
2005
Year Built
Quick Summary
Property Highlights
- Exposure: North facing
- Parking: Private garage
Property Details
Description
4 W 21, a full-service Flatiron cond-op, is a melding of the traditional stone and cast-iron loft building with a contemporary glass and stainless steel façade designed by well known architect, Hugh Hardy, with interiors by Anthony Todd. The spacious 1475 sqft, 2 bedroom 3 bathroom (2 en suite), open floor-plan offers luxury in a relaxed and airy ambiance. The entrance hall leads into a large open kitchen and great room with loft-like 9'8" ceilings and expansive north facing windows. The kitchen delivers custom Poliform Varenna white high gloss lacquer cabinets, complimented by Pied Auberge stone countertops and backsplash, a fully integrated Sub Zero refrigerator, Miele appliances and a garbage disposal. The master bath features a Kohler Tea for Two bathtub and full-sized stand-alone shower. All bathrooms have custom vanities, Robern medicine cabinets, custom lighting, and feature Glastos and Pietra Cardosa in honed finish. The apartment also offers California closets, vented front-load washer/dryer, deep stained quarter oak flooring, surround sound wiring and central digital air-conditioning.
With white glove amenities such as 24 hour doorman/concierge, a state of the art gym, 2500 sq. ft landscaped outdoor terrace, on-site parking, and a video security intercom system, this apartment is the perfect home or pied-a-terre. No mortgage recording tax, yet standard condo rules apply. Prime location, just off of Fifth Avenue, with outstanding restaurants, shopping and close proximity to Madison Square Park. 421-A tax abatement in place. Pets are welcome.
Features & Amenities
Interior Features
Building Information
Financial Details
About Flatiron
View All Flatiron ListingsThe Flatiron District is a vibrant 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
119
Median Asking Price
$2.29M
Median $/Sqft
$1,684
Avg Days on Market
N/A
New This Week
5
Price Reduced
30%
Sold (30 Days)
10
Median Sale Price
$2.80M
Live data from RLS at REBNY • Updated 3/27/26, 12:36 AM EST
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Location
4 W 21ST Street #3B, Flatiron, New York County • Near 5 AVENUE and AVENUE OF THE AMERICAS
Floor Plans
Listing Data
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Market Data
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Map & Location
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Listing Courtesy of Brown Harris Stevens Residential Sales LLC - Jeffrey Shannon/ Lisa Vaamonde
Listing Contact: (212) 906-9349
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.
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RLS Data display by Keller Williams NYC. Data last updated on 3/27/2026 at 4:36 AM UTC