Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $1,435,000

· Closed September 17, 2025

4 W 21st Street #2D
Closed For Sale Co-op

$1,435,000

$886 per sq ft

4 W 21st Street #2D

Flatiron, Manhattan

MLS® #RLS20025030

RLS at REBNY

Listing by Compass

2

Bedrooms

2.5

Baths

1,620

Sq. Ft.

2006

Year Built

Quick Summary

Bedrooms 2
Bathrooms 3 full, 1 half
Living Area 1,620 sq ft
Year Built 2006
Ownership Co-op
Maintenance $7,426/mo
Parking Garage
Neighborhood Flatiron
Floor 2 of 17

Property Highlights

  • Parking: Private garage

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 5
Baths 2 Full, 1 Half
Floor 2 of 17
Pets Yes, CatsOk, DogsOk
Year Built 2006
Living Area 1,620 sq ft
Parking Garage Available
Parking Features Garage
Structure Type MultiFamily
Furnished Unfurnished
Parcel # 0822-0045-00004-000-000002D
Block/Lot 00822/0045

Listing History

Event Date Price Change
Listed May 19, 2025 $1,575,000 -
Price Reduced Sep 23, 2025 $1,475,000 -6.3%
Currently May 9, 2026 $1,435,000 -2.7%

Description

Welcome to 4 West 21st, a modern luxury residence in the heart of the Flatiron District. With 1620 square feet of luxurious interior space and 270 square feet of private outdoor space, apartment 2D is a perfect combination of beautifully upgraded interiors, practical configuration, and a welcoming private terrace. This light-filled and spacious two-bedroom plus home office was thoughtfully designed with high ceilings and excellent attention to detail. The updated kitchen features SubZero, Bosch, and Miele appliances, a wine refrigerator, and excellent storage space. The open living area boasts floor-to-ceiling windows allowing for abundant sunlight along with wide plank oak flooring, as well as distinctive soffeted and recessed lighting, custom millwork, and electronic shades. It is a perfect space for relaxing or entertaining guests. Beyond the living area there is a beautifully outfitted and private home office featuring custom sliding doors, recessed lighting and ceiling fan. This could also be used as an interior third bedroom. The primary bedroom features floor-to-ceiling windows, an enormous walk-in closet, primary five-fixture bath with dual vanities, heated floors, and large soaking tub. The ultimate luxury is the adjacent 270 square foot terrace directly off the bedroom. The secondary bedroom is also en-suite and faces south, allowing for generous sunlight throughout the day. Designed in 2006 by renowned architect Hugh Hardy, 4 West 21st Street residents appreciate the expanse and character of a prewar loft coupled with the luxurious amenities and finishes of new construction. Amenities include a 24-hour doorman, state-of-the-art fitness center, parking garage, 2,500 square foot landscaped courtyard with children's play area, and live-in Resident Manager. This condop building does not require board approval and allows pets, unlimited subletting, pied-a-terres, co-purchasing, gifting, and parents buying for children.

Features & Amenities

Interior Features

Building Washer Dryer Install Allowed Common On Floor Common Area

Building Amenities

Elevators

Building Information

Building Data View Compliance & Permits
Total Units 56
Stories 17
Structure MultiFamily

Financial Details

Maintenance $7,426/mo
Original Price $1,575,000
Sale Price $1,435,000
Previous Price $1,475,000
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

$2.25M

Median $/Sqft

$1,761

Avg Days on Market

N/A

New This Week

14

Price Reduced

31%

Sold (30 Days)

11

Median Sale Price

$2.16M

Live data from RLS at REBNY • Updated 5/9/26, 10:51 AM EST

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Location

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4 W 21st Street #2D, Flatiron, New York County

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 $7,426 per month. Confirm the exact amount with the listing broker before making an offer.

The current listed annual property tax is $0, or roughly $0 per month. Verify the current assessment with your attorney before closing.

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

The listed interior living area is 1,620 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 $1,435,000 for 1,620 sq ft, the asking price per square foot is approximately $886. 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: RLS20025030
First Listed: 5/19/2025
On Market: 5/19/2025
Price Changed: 9/23/2025
Closed: 9/17/2025
Contract Date: 5/19/2025

Listing Courtesy of Compass - Justin D Rubinstein

Listing Contact: (646) 320-7745

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 5/9/2026 at 2:51 PM UTC

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