Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $1,425,000

· Closed October 8, 2021

Closed For Sale Co-op

$1,425,000

$939 per sq ft

4 W 21ST Street #7D

Flatiron, Manhattan

MLS® #RLS10859096

RLS at REBNY

Listing by Sotheby's International Realty, Inc.

2

Bedrooms

2.5

Baths

1,518

Sq. Ft.

2006

Year Built

Quick Summary

Bedrooms 2
Bathrooms 3 full, 1 half
Living Area 1,518 sq ft
Lot Size 9,384 sq ft
Year Built 2006
Ownership Co-op
Maintenance $5,621/mo
Neighborhood Flatiron
Floor 7 of 17

Property Highlights

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

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 5
Baths 2 Full, 1 Half
Floor 7 of 17
View City
Exposure North,South
Cooling Central Air
Pets Yes
Year Built 2006
Living Area 1,518 sq ft
Lot Size 9,384 sq ft
Parcel # 0822-0045-00004-000-000007D

Listing History

Event Date Price Change
Listed Nov 11, 2020 $1,795,000 -
Price Reduced May 5, 2022 $1,475,000 -17.8%
Currently May 18, 2026 $1,425,000 -3.4%

Description

Located in the heart of Flatiron, steps from Fifth Avenue sits this elegant 2 bedroom, 2.5 bathroom apartment in a stunning full-service building, reinvented by preeminent architect Hugh Hardy. The 1,500+ sq ft gem greets you with a proper entry foyer lined with closets, and features impeccable modern living quarters, bathed in light by floor-to-ceiling windows facing north and south. The gracious open flow affords a perfect backdrop for entertaining, with a large dining area, richly-appointed chef's kitchen with an island, generous storage and high-end appliances, and expansive living room. Beautiful quarter sewn oak floors continue into the bedroom wing where wonderful primary and guest suites await, both with a wall of windows and chic, luxurious baths. Complementing your primary suite is a huge walk-in closet and gorgeous 5-fixture spa bath appointed with dual sinks, relaxing soaking tub, and oversized glass-encased shower. The second suite also has a substantial closet and can easily be utilized as an office if desired. A powder room, additional closets, convenient washer-dryer, state-of-the-art security & video system, and CAT-5 wiring enhance the allure of this upscale home. 4 West 21st Street is an exquisite, innovatively-designed condop building in the historic, landmarked Flatiron District that reinterprets and updates the area's traditional stone and cast industrial lofts with an articulated facade of glass and stainless steel. Renowned tastemaker and event designer Antony Todd consulted on all the living spaces. The striking full-service building offers 24-hour concierge service, a live-in super, well-equipped gym, landscaped private garden, and onsite parking. Moments away is Madison Square Park, the Flatiron Building, great restaurants, lots of shopping options, and subway lines. Plus pets are welcomed at 4W21!

Features & Amenities

Interior Features

Entrance Foyer Eat In Kitchen Building Washer Dryer Install Allowed Common Area

Exterior Features

Building Courtyard Building Roof Deck Courtyard

Appliances

Dryer Washer Dryer Allowed Washer

Building Information

Financial Details

Maintenance $5,621/mo
Original Price $1,795,000
Sale Price $1,425,000
Previous Price $1,475,000

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

139

Median Asking Price

$2.42M

Median $/Sqft

$1,788

Avg Days on Market

N/A

New This Week

12

Price Reduced

32%

Sold (30 Days)

4

Median Sale Price

$1.55M

Live data from RLS at REBNY • Updated 5/18/26, 2:23 PM EST

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Location

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

Virtual Tour

Floor Plans

Floor Plan 1

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 monthly maintenance are $5,621 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 2 bedrooms and 2 full bathrooms and 1 half bathroom.

The listed interior living area is 1,518 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 2006, making it approximately 20 years old.

This listing is a co-op (stock cooperative). Buyers purchase shares in a corporation rather than real property, and the board must approve all sales.

Pets are permitted at this property. Contact the listing broker for weight limits or breed restrictions.

At the current list price of $1,425,000 for 1,518 sq ft, the asking price per square foot is approximately $939. 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: RLS10859096
First Listed: 11/11/2020
Price Changed: 5/5/2022
Closed: 10/8/2021
Contract Date: 11/11/2020

Listing Courtesy of Sotheby's International Realty, Inc. - Leslie S. Modell

Listing Contact: (212) 606-7668

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 5/18/2026 at 6:23 PM UTC

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