Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $6,750,000

· Closed March 10, 2022

31 W 21st Street #6
Closed For Sale Condo

$6,750,000

$1,432 per sq ft

31 W 21st Street #6

Flatiron, Manhattan

MLS® #RLS10759767

RLS at REBNY

Listing by Compass

4

Bedrooms

4.5

Baths

4,713

Sq. Ft.

1908

Year Built

Quick Summary

Bedrooms 4
Bathrooms 5 full, 1 half
Living Area 4,713 sq ft
Year Built 1908
Ownership Condo
HOA/Common Charges $3,025/mo
Property Taxes $68,004/yr
Neighborhood Flatiron
Floor 6 of 11

Property Highlights

  • Exposure: North,South,West facing
  • Style: Prewar architecture
  • Climate Control: Central Air

Property Details

Type Condo
Ownership Condominium
Total Rooms 10
Baths 4 Full, 1 Half
Floor 6 of 11
Exposure North,South,West
Cooling Central Air
Pets Yes
Cross Street Fifth Avenue/Avenue of the Americas
Year Built 1908
Living Area 4,713 sq ft
Architectural Style Prewar
Parcel # 0823-1207
Block/Lot 823/7503

Listing History

Event Date Price Change
Listed Sep 21, 2021 $6,750,000 -
Currently May 18, 2026 $6,750,000 -

Description

Spanning 4,713 square feet with a show stopping 50 feet of south facing frontage, loft no. 6 at 31 West 21st Street is a fully renovated 4 bedroom condo in the heart of the Flatiron District. Defining features of this massive property include 10.5' ceilings, original concrete columns, extremely low monthlies and a crisp renovation ready for its next owner. Off the keyed elevator is the loft's grand foyer. Walls of south facing windows set the tone for this extra wide and dramatic space. The 28' x 18' great room features a bay window, floor to ceiling millwork and a large entertaining space. Adjacent to the great room is another public space currently used as a den / library and home office. Flanked by a guest bedroom and a full bathroom, this room can easily be closed off by pocket doors in order to function as expansive guest quarters, or one can leave it open as a large extension of the living space. Beyond the living space is a formal dining room fitted for a 10+ person dinner party. Large scale art walls and an adjacent 12' long bar with a 75-bottle wine chiller help define this dramatic entertaining space. Beyond another set of sliding doors is the 26' x 20' chef's kitchen. Offering commercial kitchen caliber proportions, this huge space features a state of the art appliance suite including separate full height Sub-Zero refrigerator and freezer, double Wolf ovens, butcher block + granite countertops, classic shaker style cabinetry and millwork, an adjacent eat in dining table w/ built in banquette and a substantial home office area with endless storage. There is also a fully equipped laundry room right off the kitchen which features vented appliances, a utility sink and three large closets that can also function as a pantry. Beyond the kitchen is a large family room or den, which is the center point for all of the loft's north and west facing bedrooms, all of which enjoy a quiet courtyard exposure. The corner primary bedroom is massive, measuring 15' x 21' and features of wall of north and west facing windows, a 9' x 9' dressing room and a fully fitted out walk in closet. The primary bath is clean and crisp with limestone tile, double custom vanity, separate walk in shower and a deep soaking tub for two. Three more bedrooms, two more full bathrooms and five large closets complete the private quarters of the home. Additional features of this former warehouse loft space include central A/C + heat, a mud room off the foyer, a powder room, Crestron home automation and Lutron controlled lighting & window treatments throughout. 31 West 21st Street is a discreet, boutique loft condominium with only 11 units, a full time super, a key locked elevator supplemented by a service elevator, and a substantial building video security system.

Features & Amenities

Interior Features

Den Entrance Foyer Pantry Building Washer Dryer Install Allowed New Windows

Appliances

Washer Dryer Allowed

Building Information

Financial Details

Common Charges $3,025/mo
RE Taxes $68,004/yr ($5,667/mo)
Sale Price $6,750,000

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, 11:25 AM EST

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Location

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31 W 21st Street #6, Flatiron, New York County • Near Fifth Avenue/Avenue of the Americas

Building Information

Official NYC property records for this building

1924
Year Built
102 years old
5
Floors
R6B
Zoning District

Tax & Assessment

Assessed Value: $6,821,550
Land Value: $1,660,500
Exemptions: $6,821,550

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

Lot Area: 68,000 SF
Building Area: 108,500 SF
Built FAR: 1.6
Allowed FAR: 2

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 $3,025 per month. Confirm the exact amount with the listing broker before making an offer.

The current listed annual property tax is $68,004, or roughly $5,667 per month. Verify the current assessment with your attorney before closing.

This property has 4 bedrooms and 4 full bathrooms and 1 half bathroom.

The listed interior living area is 4,713 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 1908, making it approximately 118 years old.

This listing is a condominium. Buyers receive a deed to their individual unit and own their space outright, subject to condo association rules.

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

At the current list price of $6,750,000 for 4,713 sq ft, the asking price per square foot is approximately $1,432. 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: RLS10759767
First Listed: 9/21/2021
Price Changed: 9/21/2021
Closed: 3/10/2022
Contract Date: 9/20/2021

Listing Courtesy of Compass - Michael Rubin

Listing Contact: (347) 880-0349

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 3:25 PM UTC

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