Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
4 W 21ST Street #7B
Interested in this property?
Active For Sale Condop

$1,495,000

$1,014 per sq ft

4 W 21ST Street #7B

Flatiron, Manhattan

4W21

MLS® #RLS20091794

RLS at REBNY

Listing by Douglas Elliman Real Estate

Open House Scheduled

Sunday, May 17 • 11:30 AM – 11:45 AM

REBNY 2025: signed Buyer Representation Agreement required before any showing.

2

Bedrooms

3

Baths

1,475

Sq. Ft.

2005

Year Built

Quick Summary

Bedrooms 2
Bathrooms 3
Living Area 1,475 sq ft
Year Built 2005
Ownership Condop
HOA/Common Charges $6,488/mo
Parking Garage
Neighborhood Flatiron
Floor 7 of 17

Property Highlights

  • Views: City
  • Exposure: North,South facing
  • Climate Control: Central Air

Property Details

Type Condop
Ownership Condop
Total Rooms 6
Baths 3 Full
Floor 7 of 17
View City
Exposure North,South
Cooling Central Air
Pets Yes
Year Built 2005
Living Area 1,475 sq ft
Parking Garage Available
Structure Type HighRise
Basement Other
Parcel # 0822-0045-00004-000-000007B
Block/Lot 00822/0045

Listing History

Event Date Price Change
Listed May 16, 2026 $1,495,000 -
Currently May 16, 2026 $1,495,000 -

Description

Residence 7B at 4 West 21st Street is an enormous two bedroom with three full baths, washer dryer and central air conditioning in a luxury building with twenty-four hour doorman.

Bathed in soft natural light through oversized windows and wrapped in a rare sense of calm, this mint condition home pairs loft-like volume with the warmth and ease of modern living. Wide plank hardwood floors run throughout the home, while soaring ceilings and pin drop quiet interiors create an atmosphere that feels both expansive and deeply private.

At the center of the residence, an enormous open chef's kitchen was designed as much for gathering as it was for cooking, seamlessly connecting to the sprawling living and dining spaces. Thoughtfully appointed with abundant storage and exceptional proportions, it is a space equally suited for intimate dinners, slow Sunday mornings, or evenings filled with friends and conversation.

The primary suite offers a true retreat, complete with remarkable closet space and a serene, spa-like bath. The second bedroom is equally generous in scale and flexibility, ideal as a guest room, home office, or both. A private washer and dryer, central air conditioning, and extensive custom storage elevate everyday living with effortless functionality.

Residents of this full service condop enjoy the convenience of a twenty four hour doorman and one of Flatiron's most coveted locations, moments from Fifth Avenue shopping, Madison Square Park, Whole Foods, Trader Joe's, celebrated dining, and multiple subway lines.

Sophisticated yet understated, polished yet inviting, Residence 7B is downtown living at its most comfortable and refined.

Features & Amenities

Interior Features

Building Other Washer Hookup In Unit

Exterior Features

Building Courtyard

Building Amenities

Common Playroom Concierge Elevators Fitness Center Storage

Appliances

Washer Dryer Allowed

Building Information

Building 4W21
Building Data View Compliance & Permits
Total Units 56
Stories 17
Structure HighRise

Financial Details

Common Charges $6,488/mo
Land Lease Yes

The Flatiron District is a busy 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 Neighborhood

Active Listings

134

Median Asking Price

$2.32M

Median $/Sqft

$1,775

Avg Days on Market

N/A

New This Week

8

Price Reduced

33%

Sold (30 Days)

3

Median Sale Price

$1.40M

Live data from RLS at REBNY • Updated 5/16/26, 6:05 PM EST

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Location

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4 W 21ST Street #7B, Flatiron, New York County

Building Information

Official NYC property records for this building

2005
Year Built
21 years old
17
Floors
54
Residential Units
C6-4A
Zoning District
Elevator Apartments Historic District: Ladies' Mile Historic District

Tax & Assessment

Assessed Value: $18,077,400
Land Value: $900,000
Exemptions: $2,290

Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.

Lot Area: 9,384 SF
Building Area: 119,136 SF
Built FAR: 12.7
Allowed FAR: 10

Source: NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning (data.cityofnewyork.us)

Want help estimating ownership costs or understanding building compliance? Let's discuss

Frequently Asked Questions

Common questions about this property

The current listed common charges are $6,488 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 2 bedrooms and 3 full bathrooms.

The listed interior living area is 1,475 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 2005, making it approximately 21 years old.

This listing is a condop, a hybrid structure where the building is legally a co-op but individual units are sold with greater flexibility, often including subletting rights similar to condos.

Pets are permitted at this property: Pets allowed,Building Pets Allowed Comments:Pets allowed. Contact the listing broker for weight limits or breed restrictions.

At the current list price of $1,495,000 for 1,475 sq ft, the asking price per square foot is approximately $1,014. This figure is for reference only and may differ from appraised or assessed values.

To schedule a private showing, contact Milton Coste at (917) 416-7433 or [email protected]. Per REBNY guidelines effective 2025, a Buyer Representation Agreement is required before a buyer's broker can show you properties. You may attend open houses independently without one.

Have a question not answered here?

(917) 416-7433
MLS® ID: RLS20091794
First Listed: 5/16/2026
On Market: 5/16/2026
Price Changed: 5/16/2026
Contract Date: 5/16/2026

Listing Courtesy of Douglas Elliman Real Estate - Joshua B Rubin

Listing Contact: (917) 727-6321

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.

Broker Commission Disclosure: Broker commissions are not set by law and are fully negotiable.

Buyer Notice: Planning to work with a buyer's broker? A Buyer Representation Agreement is required before your broker can show you properties, per REBNY/UCBA guidelines (effective 2025). You may attend open houses independently without one.

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 5/16/2026 at 10:05 PM UTC

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