Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $1,050,000

· Closed November 2, 2020

4 W 21st Street #17-B
Closed For Sale Condop

$1,050,000

$1,329 per sq ft

4 W 21st Street #17-B

Flatiron, Manhattan

MLS® #RLS10343133

RLS at REBNY

Listing by Compass

1

Bedroom

1

Bath

790

Sq. Ft.

2006

Year Built

Quick Summary

Bedrooms 1
Bathrooms 1
Living Area 790 sq ft
Year Built 2006
Ownership Condop
HOA/Common Charges $3,147/mo
Parking Garage
Neighborhood Flatiron
Floor 17 of 17

Property Highlights

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

Property Details

Type Condop
Ownership Condop
Total Rooms 3
Baths 1 Full
Floor 17 of 17
View City
Exposure North,South,West
Cooling Central Air
Pets Yes
Cross Street Fifth Avenue/Avenue of the Americas
Year Built 2006
Living Area 790 sq ft
Parking Garage Available
Block/Lot 822/45

Listing History

Event Date Price Change
Listed Oct 26, 2005 $1,050,000 -
Price Reduced Mar 7, 2018 $1,150,000 +9.5%

Description

Modern, elegant and spacious, this high floor airy one bedroom loft is the epitome of downtown luxury with dreamlike city views. Housed in a contemporary building designed by preeminent architect Hugh Hardy, 4 West 21st Street offers residents unparalleled luxury and style in its every amenity a 24 hour concierge, a fully equipped gym, a 2500 square foot landscaped common outdoor space, and onsite parking in the building. Enter Residence 17B through an over-sized solid oak door into a dramatic foyer perfect for displaying your art collection. This gracefully leads you down a wide hallway into the covetable chef's kitchen outfitted with top-of-the-line fixtures including sleek Poliform Varenna white gloss cabinets, solid Pied Auberge stone countertops, a Sub-Zero refrigerator, Miele gas range and dishwasher, and an extra-large Kohler sink with disposal. The sun-flooded living room has floor-to-ceiling windows highlighting the picturesque northern and western views. 17B also features custom closets throughout the apartment, a full-size vented washer/dryer, striking dark-stained oak floors, central air-conditioning, and a spa-like bathroom with Glastos honed floors and walls, and a frameless glass shower. Best of all, you can sublet freely in this condop. 90% financing is allowed, pets are welcome, and pieds-a-terre, co-purchasing, and subleasing are permitted. Contact us for a private viewing.

Features & Amenities

Interior Features

Dining Area 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 $3,147/mo
Sale Price $1,050,000
Previous Price $1,150,000

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, 7:28 PM EST

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Location

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4 W 21st Street #17-B, Flatiron, New York County • Near Fifth Avenue/Avenue of the Americas

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 $3,147 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 1 bedroom and 1 full bathroom.

The listed interior living area is 790 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 $1,050,000 for 790 sq ft, the asking price per square foot is approximately $1,329. 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 mcoste@kwnyc.com. 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: RLS10343133
First Listed: 10/26/2005
Price Changed: 3/7/2018
Closed: 11/2/2020
Contract Date: 6/11/2020

Listing Courtesy of Compass - Elkin Serna

Listing Contact: (917) 578-9551

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 11:28 PM UTC

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