4W21

4 West 21St Street Cooperative in Flatiron, Manhattan

Highline Residential
BUILDING AVAILABILITY RESIDENCES ACTIVITY
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4W21

4 West 21St Street

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Photo for 4W21 - 4 West 21St Street Cooperative in Flatiron, Manhattan
Unit 16A | 2BD | 2BA Listing Courtesy of Compass | RLS by REBNY
Photo for 4W21 - 4 West 21St Street Cooperative in Flatiron, Manhattan
Unit 7A | 2BD | 2BA Listing Courtesy of Yoreevo LLC | RLS by REBNY
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4W21 at 4 West 21St Street Building Details
4W21 is a luxury coop located at 4 West 21st Street, New York, NY 10010. The building was designed by renowned architect Hugh Hardy and features a contemporary glass and steel facade. The interiors were elegantly designed by Antony Todd.

The building offers a variety of spacious and well-appointed apartments, perfect for those seeking a modern and stylish living experience. The apartments feature high ceilings, floor-to-ceiling windows, and top-of-the-line finishes.

Amenities at 4W21 include a 24-hour doorman, fully-equipped gym, garage, storage space, and a landscaped common garden. Residents also have access to a 2500 sq ft outdoor terrace, providing a peaceful retreat in the heart of the city.

The location of 4W21 is unbeatable, with easy access to Madison Square Park, Union Square Farmers' Market, Eataly, Trader Joe's, Whole Foods, and Fifth Avenue shopping. The area is also known for its vibrant dining scene, with a variety of top restaurants nearby.

Residents at 4W21 are welcome to bring their pets, making this building a perfect choice for pet lovers. With its luxurious amenities, prime location, and pet-friendly environment, 4W21 offers an unparalleled living experience in the heart of New York City. Whether you're seeking a modern and stylish home or a convenient and vibrant neighborhood, 4W21 has everything you need.
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4W21 Building Amenities
  • Common Outdoor Space
  • Common parking/Garage
  • Full-time doorman
  • New construction
  • On-site laundry
  • Parking Available
  • Pets - Cats ok
  • Pets - Dogs ok
  • Pied-A-Terre Allowed
  • Concierge
  • Elevator
  • Gym/Fitness
  • Playroom
  • Storage
Active Listings & Units
4W21 Residences
Recent Activity at 4W21
Apartment Floor Plans
Building Facts for 4 West 21St Street, New York 10010
  • Available Sales Listings: 2
  • Street Address: 4 West 21St Street, New York, NY 10010
  • Property Type: Cooperative
  • Elevator Building
  • New Development
  • Doorman: Full-time doorman
  • Neighborhood: Flatiron / Manhattan
  • Building Name: 4W21
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Map Location of 4W21 and nearby points of interest
Map of the building location
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Alternate Addresses for 4W21 in NYC
  • 4 WEST 21 STREET
  • 6 WEST 21 STREET
  • 8 WEST 21 STREET
  • 10 WEST 21 STREET
4W21 is a 55-apartment Cooperative in Flatiron, Manhattan, located at 4 West 21St Street, New York 10010.

Frequently asked questions about 4W21

- Is 4W21 a new development in NYC?
Yes, 4W21 is a new development in NYC that was built in 2005
- What is the address of 4W21 in NYC?
The address of 4W21 is 4 West 21St Street, New York, NY 10010
- How many residential units does 4W21 have?
4W21 has 55 residential units.
- Are there available sales or rental listings at 4W21?
Yes, there are currently several rental and 2 sales listings available at 4W21
- What year was 4W21 built in?
4W21 was built in 2005
Looking for 4W21 sales and new to homebuying? Check out our NYC closing cost calculator
All information regarding an apartment or property for sale or rent as well as tax or financing information is deemed to come from reliable sources. No representation or guarantee, however, is made as to the accuracy thereof, and such information is subject to errors, omission, changes, prior to sale or rental, commission or withdrawal without notice. All square footage, dimensions, or number of rooms are approximate and provided for guidance and on a best-efforts basis only. Please verify square footage yourself before making any decisions. Exact dimensions and room counts can be obtained by retaining the services of a professional architect or engineer.
This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2025 The Real Estate Board of New York, Inc., All rights reserved. RLS IDX Data display by Highline Residential, LLC. IDX information is provided exclusively for consumers' personal, non-commercial use and that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. The data relating to real estate for sale on this website comes in part from the IDX Program of OneKey™ MLS. The source of the displayed data is either the property owner or public record provided by non-governmental third parties. It is believed to be reliable but not guaranteed. This information is provided exclusively for consumers’ personal, non-commercial use. Information Copyright 2023, OneKey™ MLS. All Rights Reserved.
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RLS Data display by Highline Residential. 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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By submitting your contact details you agree that a Licensed Real Estate Professional from Highline Residential may call/text/email you about your inquiry, which may involve use of automated means. This Web site has no affiliation to the building, developer, or management company.
This field is required
Either email or phone number is required
Either phone number or email is required
This field is required
By submitting your contact details you agree that a Licensed Real Estate Professional from Highline Residential may call/text/email you about your inquiry, which may involve use of automated means. This Web site has no affiliation to the building, developer, or management company.
This field is required
Either email or phone number is required
Either phone number or email is required
This field is required
By submitting your contact details you agree that a Licensed Real Estate Professional from Highline Residential may call/text/email you about your inquiry, which may involve use of automated means. This Web site has no affiliation to the building, developer, or management company.