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4 West 21st Street 12CNew York, NY 10010

For Sale

$1,250,000

Smart Buyer Rebate $15,625

Introducing an exceptional opportunity to own a refined modern residence in the heart of the Flatiron District. Residence 12C at 4 West 21st Street offers 1,073 square feet of thoughtfully designed living space, perfectly balancing loft-like openness with contemporary comfort.

Upon entry, the home immediately impresses with rich dark hardwood floors, central air conditioning, and walls of floor-to-ceiling windows that flood the residence with natural light throughout the day. The expansive layout allows for effortless entertaining while maintaining a sense of intimacy and flow.

At the heart of the home is a chef’s kitchen, beautifully appointed with Sub-Zero refrigeration, a Miele gas range and dishwasher, a generously sized Kohler sink with garbage disposal, Poliform Varenna high-gloss lacquer cabinetry, and Pied Auberge stone countertops, creating a sleek and highly functional culinary space.

The open-concept kitchen seamlessly connects to the dining and living areas, while the oversized primary bedroom is tucked away for privacy and features three spacious closets and a luxurious, windowed five-fixture en-suite bathroom with a Kohler soaking tub and separate glass-enclosed shower. A second full bathroom, ideal for guests, adds flexibility and convenience. An in-unit washer/dryer completes the home.

Designed by Hugh Hardy with interiors by Anthony Todd, 4 West 21st Street is a full-service condop offering a 24-hour concierge, live-in superintendent, fitness center, landscaped outdoor spaces, and on-site parking garage.

Perfectly situated just moments from Fifth Avenue, Madison Square Park, Eataly, Trader Joe’s, and major transportation including the 1, 6, N, R, F, and M trains, this residence delivers sophisticated city living in one of Manhattan’s most coveted neighborhoods.

There is an assessment in place in the amount of $804.48 per month ending on June 1,2027.

Listed by Justin D Rubinstein

·

Compass

·

(646) 320-7745

Last updated April 01, 2026

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Source: REBNY #RLS20070403

RLS Data display by Prevu Real Estate LLC

Listing Facts

  • TypeCo-op
  • NeighborhoodFlatiron District
  • Bedrooms1
  • Bathrooms2
  • Days on Prevu11
  • HOA/Maint. Fees$5,115/month
  • Size1,073 sqft
  • Price per sqft$1,165

Amenities

  • Private Outdoor Space
  • Pets Allowed
  • Concierge
  • Parking

Location

Mortgage Calculator

Listing History

03/24/2026
Listed by Compass
$1,250,000

Estimated Closing Costs

Total
$22,000
Attorney Fees
$4,000
NYC Mansion Tax
$12,500
Bank Attorney
$1,500
Other Closing Costs
$4,000

Estimated closing costs are based on the list price of $1,250,000 and a 20% downpayment. These estimates are for indicative purposes only. Actual closing costs may vary for each transaction. See the Closing Costs Calculator for calculations specific to your situation.

Property Details for 4 West 21st Street 12C

Association

Amenities

  • Pets Allowed: Building Yes
  • Concierge: Concierge Yes, Doorman Full Time

Fees

  • Association Fee: $5,115.00 Monthly

Exterior

Construction

  • Number Of Units Total: 56
  • Stories Total: 17
  • Structure Type: High Rise
  • Year Built: 2006
  • Building Name: 4W21
  • Entry Level: 12

Features

  • Building Features: Elevator(s)
  • Patio And Porch Features: Deck

Measurements

  • Lot Size Dimensions: 102
  • Lot Size Units: SquareFeet

Financial

Other

  • Land Lease: Yes

Taxes

  • Parcel Number: 0822-0045-00004-000-000012C

Interior

Measurements

  • Living Area: 1,073
  • Living Area Units: SquareFeet

Rooms

  • Bathrooms Full: 2
  • Bathrooms Total Integer: 2
  • Bedrooms Total: 1
  • Rooms Total: 4

Other

Location

  • City Region: Manhattan
  • Subdivision Name: Flatiron
  • Tax Block: 00822
  • Tax Lot: 0045

Parking

Parking

  • Garage: Yes
  • Parking Features: Garage

Utilities

Equipment

  • Laundry Features: Common Area

Frequently Asked Questions

How many bedrooms and bathrooms does this co-op have?

There is 1 bedroom and 2 bathrooms in this co-op at 4 West 21st Street 12C.

Are pets allowed at 4 West 21st Street?

Yes, 4 West 21st Street allows pets. Check the Property Details for any relevant restrictions.

How does 4 West 21st Street 12C compare to other co-ops in Flatiron District?

This co-op is listed 62% below the average price for co-ops in Flatiron District and has been on the market for 116 less days than the typical home in this area.

What building or home owners association is the co-op part of?

This co-op is in the 4 W21 building.

What is the square footage on this co-op?

According to the MLS, this listing is 1,073 sqft.

4 West 21st Street 12C is a 1-bedroom, 2-bath co-op for sale in New York NY 10010. On Prevu for 11 days at $1,250,000. This residence features 1,073 square feet of living space, located in Flatiron District. The median listing price for co-ops in this area is $2,995,000. Additional amenities include private outdoor space, pets allowed, doorman, and parking. Explore more co-op listings in Manhattan.

RLS Data display by Prevu Real Estate LLC The Registrant acknowledges each other RLS Broker's ownership of, and the validity of their respective copyright in, the Exclusive Listings that are transmitted over the RLS. The information is being provided by RLS at REBNY Listing Service, Inc. Information deemed reliable but not guaranteed. Information is provided for consumers' personal, non-commercial use, and may not be used for any purpose other than the identification of potential properties for purchase. This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. 2026 RLS at REBNY Listing Service, Inc. All rights reserved. Based on information from the Real Estate Board of New York and/or other sources. This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity. 2026 The Real Estate Board of New York, Inc., All rights reserved.

Full MLS Disclaimers

Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.