Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $1,200,000

· Closed December 15, 2021

4 W 21st Street #10-C
Closed For Sale Condop

$1,200,000

$1,118 per sq ft

4 W 21st Street #10-C

Flatiron, Manhattan

MLS® #RLS10708900

RLS at REBNY

Listing by Compass

2

Bedrooms

2

Baths

1,073

Sq. Ft.

2006

Year Built

Quick Summary

Bedrooms 2
Bathrooms 2
Living Area 1,073 sq ft
Year Built 2006
Ownership Condop
HOA/Common Charges $3,865/mo
Parking Garage
Neighborhood Flatiron
Floor 10 of 17

Property Highlights

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

Property Details

Type Condop
Ownership Condop
Total Rooms 4
Baths 2 Full
Floor 10 of 17
View City
Exposure North
Cooling Central Air
Pets Yes
Cross Street Fifth Avenue/Avenue of the Americas
Year Built 2006
Living Area 1,073 sq ft
Parking Garage Available
Block/Lot 822/45

Listing History

Event Date Price Change
Listed Apr 5, 2021 $1,200,000 -
Currently May 18, 2026 $1,200,000 -

Description

Welcome to 10C at 4W21, a sleek, spacious 1 bedroom (convertible 2) 2 bathroom apartment in the heart of the Flatiron District. Enjoy full-service luxury living in a spectacular building and premier location, met by impeccably-designed modern interiors. The layout is generous and airy, enriched by wide-plank oak wood floors, a fabulous wall of custom built-ins, chic dcor and refined finishes throughout. An open living and dining room is a perfect backdrop for relaxing and entertaining, accompanied by a stunning modern open kitchen. Chef's quarters are well-appointed with Varenna cabinetry and high-end Sub-Zero & Miele appliances. The entire ambience is bathed in light and enhanced by fabulous city and Empire State Building views framed by floor-to-ceiling windows. A gracious entry foyer centers the 1,073 sq ft home, with a private door to the left leading into the sun-filled primary bedroom suite. A wall lined with massive closets and an elegant 5-fixture spa bath featuring a dual-sink vanity, oversized shower, soaking tub, window wall and heated floors enhance the experience. Versatile living space allows for the creation of an additional bedroom if desired. Down the hall is a beautiful secondary full bath and a convenient washer-dryer. A Nest system provides state-of-the-art control of smart home features and central air. Built in 2006, 4 West 21st Street is a striking full-service condominium of glass and steel conceived by famed architect Hugh Hardy, with interiors by Anthony Todd. The building offers full condo rules and allows pets, subletting, co-purchasing and pied-a-terres. A full-time doorman, live-in super, onsite parking garage, fully-equipped gym, and landscaped private garden terrace optimize the attractive lifestyle. Ideally located near Madison Square Park, Union Square Park and greenmarket, Eataly, abundant restaurants, shopping and subway transportation.

Features & Amenities

Interior Features

Entrance Foyer Building Washer Dryer Install Allowed Common Area New Windows

Exterior Features

Building Courtyard Building Roof Deck

Appliances

Dryer Washer

Building Information

Financial Details

Common Charges $3,865/mo
Sale Price $1,200,000

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, 12:15 PM EST

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Location

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4 W 21st Street #10-C, Flatiron, New York County • Near Fifth Avenue/Avenue of the Americas

Floor Plans

Floor Plan 1
Floor Plan 2

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 $3,865 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 2 bedrooms and 2 full bathrooms.

The listed interior living area is 1,073 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 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. Contact the listing broker for weight limits or breed restrictions.

At the current list price of $1,200,000 for 1,073 sq ft, the asking price per square foot is approximately $1,118. 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: RLS10708900
First Listed: 4/5/2021
Price Changed: 6/14/2021
Closed: 12/15/2021
Contract Date: 4/4/2021

Listing Courtesy of Compass - Arielle D'Adamo

Listing Contact: (845) 656-0850

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 4:15 PM UTC

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