Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
6 W 20th Street #7

For Sale · Listing by Compass

6 W 20th Street #7

Flatiron, Manhattan

$4,850,000

Interested in this property?
Active For Sale • Co-op

$4,850,000

$1,183 per sq ft

6 W 20th Street #7

Flatiron, Manhattan

MLS® #RLS20120388

RLS at REBNY

Listing by Compass

3
Bedrooms
2
Baths
4,100
Sq. Ft.
1910
Year Built

Quick Summary

Bedrooms 3
Bathrooms 2
Living Area 4,100 sq ft
Lot Size 4,600 sq ft
Year Built 1910
Ownership Co-op
Maintenance $8,656/mo
Neighborhood Flatiron
Floor 7 of 11

Property Highlights

  • Exposure: North,South facing
  • Style: Loft architecture
  • Character: Pre-war building (1910)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 6
Baths 2 Full
Floor 7 of 11
Exposure North,South
Pets Yes, CatsOk, DogsOk
Year Built 1910
Living Area 4,100 sq ft
Architectural Style Loft
Structure Type MixedUse
Flooring Hardwood
Furnished Unfurnished
Lot Size 4,600 sq ft
Block/Lot 00821/0049

Listing History

Event Date Price Change
Listed Oct 11, 2026 $4,850,000 -
Currently Oct 11, 2026 $4,850,000 -

Description

Spanning approximately 4,100 square feet, the entire seventh floor at 6 West 20th Street presents a rare opportunity to acquire an expansive, authentic live/work loft at an exceptional value. Dramatic 12.5-foot ceilings, generous proportions, and an abundance of original architectural detail establish an extraordinary foundation. Original beamed ceilings, exposed brick, and oversized steel-casement windows lend the space an unmistakable industrial character, while open northern and southern exposures invite beautiful natural light in throughout the day. The result is a light-filled, authentic loft with a remarkable sense of scale and architectural integrity—qualities increasingly difficult to find in Manhattan. Situated within the Ladies’ Mile Historic District, the distinguished building offers a connection to a storied chapter of New York’s architectural and commercial history, when the surrounding streets formed one of Manhattan’s most celebrated retail corridors. Today, the neighborhood seamlessly blends its historic character with a vibrant contemporary energy, defined by acclaimed restaurants, independent boutiques, destination shopping, and cultural attractions. Moments from Fifth Avenue’s premier shopping, Madison Square Park, and the celebrated dining destinations of Flatiron and NoMad, the property is also ideally positioned near the Union Square Greenmarket, where some of the city’s finest local farmers and purveyors gather throughout the week. A short distance away, West Chelsea’s renowned gallery district offers access to some of the world’s leading contemporary art galleries, making this an especially compelling location for collectors, artists, and those drawn to New York’s creative pulse. The result is an exceptional downtown setting that combines architectural heritage, cultural sophistication, and everyday convenience. Known more intimately as The Greenwich Building, 6 West 20th Street is a boutique, 11-story cooperative comprising just nine residences, designed and built in 1910 by esteemed architects Schwartz & Gross. The building has recently completed a series of capital improvements and infrastructure upgrades, including new passenger and freight elevators, updated electrical and plumbing systems, and a new Butterfly virtual doorman system, with a new roof nearing completion. The cooperative permits ownership through LLCs and trusts, pied-à-terre use, subletting, and pets. A full-time superintendent is on site Monday through Friday, providing attentive care for the building, while private access to an extra-wide freight elevator on every floor makes deliveries, art installations, and the movement of oversized furniture and materials exceptionally convenient.

Features & Amenities

Interior Features

High Ceilings Building Washer Dryer Install Allowed In Unit Flooring: Hardwood

Building Amenities

Elevators

Building Information

Building Data View Compliance & Permits
Total Units 9
Stories 11
Structure MixedUse
Style Loft

Financial Details

Maintenance $8,656/mo

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

121

Median Asking Price

$2.85M

Median $/Sqft

$1,941

Avg Days on Market

N/A

New This Week

10

Price Reduced

23%

Sold (30 Days)

14

Median Sale Price

$1.95M

Live data from RLS at REBNY • Updated 10/11/26, 7:43 PM EST

Similar Listings in Flatiron

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Location

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6 W 20th Street #7, Flatiron, New York County

Building Information

Official NYC property records for this building

M1-5M
Zoning District

Tax & Assessment

Assessed Value: $1,228,950
Land Value: $1,228,950
Exemptions: $1,228,950

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

Lot Area: 4,600 SF

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 $8,656 per month. Confirm the exact amount with Milton Coste 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 3 bedrooms and 2 full bathrooms.

The listed interior living area is 4,100 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 1910, making it approximately 116 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 Milton Coste for weight limits or breed restrictions.

At the current list price of $4,850,000 for 4,100 sq ft, the asking price per square foot is approximately $1,183. 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 milton@miltoncoste.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: RLS20120388
First Listed: 10/11/2026
On Market: 10/11/2026
Price Changed: 10/11/2026
Contract Date: 9/3/2026

Listing Courtesy of Compass - Iv Frank Suriano

Listing Contact: (561) 358-6204

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.

How working with a buyer's agent works: I work for you, not the seller. Before I show you anything, New York brokerage rules ask us to put that in writing: an agreement and a disclosure that say I work for you and negotiate on your behalf. The agreement is non-exclusive: you can work with other agents, it runs for a short fixed term we agree on, and you can end it with a note. You may attend open houses independently without an agreement. Read how it works

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 10/11/2026 at 11:43 PM UTC

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Milton Coste - NYC Real Estate Broker

Milton Coste

Licensed Real Estate Associate Broker

Keller Williams NYC

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Sale history, taxes, violations and comps for this unit

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Flatiron Market Update

14 sales last 30 days · $2.85M median · 8.6 months supply

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New listings in this neighborhood

Quick Facts

Status Active Type Co-op Neighborhood Flatiron Borough Manhattan
County New York
Floor 7 of 11
Year Built 1910
First Listed 10/11/2026
Style Loft
Living Area 4,100 sqft
Maintenance $8,656/mo

Monthly Costs Estimate

Down Payment 20%

$970,000

Interest Rate Loading...

Source: Freddie Mac PMMS

Loan Term 30 years

Est. Monthly Payment

$0

Principal & Interest $0
PMI (under 20% down) $0
Maintenance $8,656
Total Monthly $0

Estimates only. Consult a lender for exact figures.

Mansion tax applies at this price point

New York State charges the buyer a mansion tax on residential purchases at $1,000,000 or more. At this asking price the tier is $3M to $4,999,999 at 1.50%, applied to the whole purchase price. It is due in cash at closing and cannot be financed.

Estimated mansion tax at asking

$72,750

Run the numbers on a different offer price

Estimate based on the asking price. Confirm your own obligation with your real estate attorney.

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