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House for sale at 4 W 21st Street #3-AD, New York, NY 10010 | MLS# RLS20070160 | Listing updated on 2026-04-19
Photo 1 of House for sale at 4 W 21st Street #3-AD, New York, NY 10010 | MLS# RLS20070160 | Listing updated on 2026-04-19
Photo 2 of House for sale at 4 W 21st Street #3-AD, New York, NY 10010 | MLS# RLS20070160 | Listing updated on 2026-04-19
Photo 3 of House for sale at 4 W 21st Street #3-AD, New York, NY 10010 | MLS# RLS20070160 | Listing updated on 2026-04-19
Photo 4 of House for sale at 4 W 21st Street #3-AD, New York, NY 10010 | MLS# RLS20070160 | Listing updated on 2026-04-19
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$2,900,000

Monthly Est:$14,434

  • Beds Icon4 Beds
  • Beds Icon
    3 Baths
  • Beds Icon3,000sqft

4 W 21st Street #3-AD, New York, NY 10010

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  • Apartment

  • Built in 2006

  • $11,545/mo HOA

  • -- sqft lot

  • $967/sq.ft

Description

Welcome to Residence 3AD at 4 West 21st Street. A rare, full-floor–scale Flatiron District home offering privacy, flexibility, and long-term versatility. Spanning approximately 3,000 square feet, this thoughtfully combined residence delivers the scale and comfort of a private home with the freedom of condop ownership. With 10-foot ceilings, two separate entryways, and a layout designed to evolve over time, Residence 3AD is equally well-suited for families, co-purchasers, or long-term investors seeking adaptability. A gracious foyer opens to expansive, north-facing living and dining spaces that anchor the home, ideal for daily living, entertaining, or shared use without co...

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  • Houzeo last checked: 9 minutes ago
  • Listing updated: April 19, 2026 at 7:10 pm
  • Listing Provided by: Isabella Bravo (917) 828-4992 , Carolina Bravo (917) 696-4801 | Nest Seekers LLC (212) 252-8772
  • Source: Rebny MLS-NY | MLS#: RLS20070160 Rebny MLS-NY

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Building
4 W 21St St
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Property Details

  • Status

    Active

  • Type

    Condominium

  • No. of Stories

    17

  • County

    New York County

  • City

    New York

  • Neighborhood

    Flatiron District

  • Year Built

    2006

  • HOA Fees

    $11545/mo

  • Finished Area

    3,000 sqft

  • Lot Size

    -- sqft lot

  • Basement Area

    - sqft

  • MLS Name

    Rebny MLS

  • MLS Number

    RLS20070160

  • Days on Market

    228

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HOA Management

N/A

HOA Fees

$11,545/ Monthly

Amenities

Amenities and services may be covered by one or multiple associations and service providers.

Disclaimer: Amenities are based on third-party information and may vary; buyers must independently verify all amenities, as information is deemed reliable but not guaranteed.

Facts & Features

Rooms

  • Bedrooms & bathrooms

    Bedrooms: 4

    Bathrooms: 3

Interior

  • Exterior Features

    Building Storage, Building Courtyard, Building Roof Deck

  • Cooling

    Central Air

  • Interior Features

    Dining Area

Construction

  • Year Built

    Year Built: 2006

  • Home type

    Apartment

  • Architectural Style

    Loft

Utilities & Energy

  • Laundry Features

    Building Washer Dryer Install Allowed, Common Area

Other Features

  • Subdivision Name

    Flatiron

Price History

DateEventPrice

02/03/2026

Source: mls_logoRebny MLS-NY #RLS20070160

Price Increased

$3,350,000 +15.52%

$1,117/sqft

02/03/2026

Source: mls_logoRebny MLS-NY #RLS20070160

Listed for Sale

$2,900,000

$967/sqft

The real estate listing data marked with this icon comes from the IDX program of the RLS at REBNY Listing Service (RLS). Listing information for certain New York City properties provided courtesy of the Real Estate Board of New York's Residential Listing Service (the "RLS") through Sep 20, 2026, 06:45AM. Information deemed reliable but not guaranteed. Information is provided exclusively for consumers' personal, non-commercial use, and may not be used for any purpose other than the identification of potential properties for purchase. 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. Buyer to verify all information. © 2026 The Real Estate Board of New York, Inc. All rights reserved.

Advertising Broker: Mark Karten | Karten Real Estate Services

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