For Sale
3D Tour3D Tour
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
9+
Beds Icon

Virtual Tour

Beds Icon

Street View

$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

Get Pre-Approved

  • 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 compromise. The kitchen is connected via a passthrough, maintaining separation while allowing ease of flow, and is complemented by a dedicated dining room and breakfast nook that support everything from weekday mornings to formal gatherings. The south-facing bedroom wing offers four generously proportioned bedrooms, providing exceptional quiet and privacy rarely found in this part of Manhattan. The primary suite functions as a true retreat, complete with a walk-in closet, en-suite bath, and an adjacent office or library, perfect for work-from-home flexibility or future reconfiguration. Designed by acclaimed architect Hugh Hardy, 4 West 21st Street is a boutique, full-service condop that offers the advantages of condo ownership. The building allows pets, unlimited subletting, pied-a`-terres, co-purchasing, gifting, and parents buying for children, making it an ideal choice for multigenerational living, friends buying together through an LLC, or investors seeking maximum flexibility. Amenities include a 24-hour doorman, landscaped common terrace, fitness center, and on-site parking. Located just steps from Madison Square Park, and surrounded by the best of Flatiron, NoMad, and Union Square, residents enjoy immediate access to top dining, culture, and green space, including Eataly, ABC Kitchen, Trader Joe's and more! Private showings available by appointment with The 212Bravo Team at Nest Seekers.

  • Houzeo last checked: 1 hour 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

This condo is in:

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

    273

Continue Your Journey in App

Find your dream home, receive real-time updates, and many more!

Location

HOA Management

N/A

HOA Fees

$11,545/ Monthly

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

  • Interior Features

    Dining Area

  • Cooling

    Central Air

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 Nov 04, 2026, 11:45AM. 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: Derek Greene | The Greene Realty Group

Skip to Main Content