Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
6 W 20TH Street #5

For Sale · Listing by Corcoran Group

6 W 20TH Street #5

Flatiron, Manhattan

$8,475,000

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

$8,475,000

6 W 20TH Street #5

Flatiron, Manhattan

The Greenwich Build

MLS® #RLS20122018

RLS at REBNY

Listing by Corcoran Group

4
Bedrooms
4.5
Baths
N/A
Sq. Ft.
1907
Year Built

Quick Summary

Bedrooms 4
Bathrooms 5 full, 1 half
Year Built 1907
Ownership Co-op
Maintenance $8,656/mo
Neighborhood Flatiron
Floor 5 of 11

Property Highlights

  • Views: City
  • Style: Loft architecture
  • Character: Pre-war building (1907)

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 9
Baths 4 Full, 1 Half
Floor 5 of 11
View City
Pets Yes
Year Built 1907
Architectural Style Loft
Basement Other
Parcel # 0821-0049-00006-000-0000005
Block/Lot 00821/0049

Listing History

Event Date Price Change
Listed Oct 21, 2026 $8,475,000 -
Currently Oct 21, 2026 $8,475,000 -

Description

Some lofts have the look. This one has the look, the scale, and a brand-new renovation that gets just about everything right. Recently renovated from top to bottom, this approximately 4,100-square-foot full-floor residence at 6 West 20th Street is the kind of authentic New York loft that reminds you why we love them in the first place. Nearly 12-foot ceilings, beautiful natural light, generous proportions, and a private keyed elevator entry. Add exceptional materials, meticulous craftsmanship, and not a renovation decision left to chance, and you have something pretty special.A central gallery opens into an expansive living and dining space flooded with northern and southern light. The Boffi chef's kitchen, with its matching butler's pantry and spectacular Arabescato Orobico Grigio marble island, is a showstopper without trying too hard. Handcrafted glass-and-steel pocket doors open to a separate media room, giving you the flexibility to entertain, escape, or simply close the door on whatever's happening in the rest of the apartment. The primary suite is tucked away from the action, where it belongs. There's a generous walk-in closet and a spa-worthy bath wrapped in book-matched silver travertine, complete with a deep soaking tub, steam shower, sculptural stone vanity, separate water closet, and radiant heated floors. Three additional bedrooms, three more full bathrooms, and a custom black marble powder room mean everyone gets their own space. Always a good thing. And because a beautiful renovation should be more than just a pretty face, the details go well beyond the obvious. Ten-inch-wide custom-milled white oak floors, bespoke laundry room millwork, custom closet interiors, and newly constructed walls with acoustic insulation make this home as comfortable and quiet as it is gorgeous. Yes, you can have loft living without hearing every little thing your neighbors are doing. The technology is equally well considered: a museum-quality warm-dim LED lighting plan, Lutron lighting controls and motorized shades, Sonos-enabled audio, six-zone central HVAC with humidity control, and even a concealed cinema screen in the primary bedroom. Because if you're going to do a renovation, do it properly. Set in a discreet pre-war co-op in the heart of the Flatiron District, 6 West 20th Street puts Whole Foods, Eataly, excellent restaurants, shopping, and transit right where you want them: close by. The building is pet-friendly and thoughtfully managed, with the historic character of old New York and the modern infrastructure to make living here a pleasure. A true New York loft, beautifully reimagined from top to bottom. All the character you want, all the comforts you need, and not a thing left on the to-do list.

Features & Amenities

Interior Features

Building None Washer Hookup In Unit

Exterior Features

None

Building Amenities

Elevators

Appliances

Washer Dryer Allowed

Building Information

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

118

Median Asking Price

$2.81M

Median $/Sqft

$1,936

Avg Days on Market

N/A

New This Week

5

Price Reduced

22%

Sold (30 Days)

16

Median Sale Price

$1.95M

Live data from RLS at REBNY • Updated 10/21/26, 4:28 PM EST

Similar Listings in Flatiron

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Location

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6 W 20TH Street #5, 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.

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

According to MLS records, the building was constructed in 1907, making it approximately 119 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: Pets Allowed,Building Pets Allowed Comments:Pets Allowed. Contact Milton Coste for weight limits or breed restrictions.

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: RLS20122018
First Listed: 10/21/2026
On Market: 10/21/2026
Price Changed: 10/21/2026
Contract Date: 10/21/2026

Listing Courtesy of Corcoran Group - Holly L Sose

Listing Contact: (917) 657-1055

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 10/21/2026 at 8:28 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

16 sales last 30 days · $2.81M median · 7.4 months supply

Read Full Report

New listings in this building

Quick Facts

Status Active Type Co-op Neighborhood Flatiron Borough Manhattan
County New York
Floor 5 of 11
Year Built 1907
First Listed 10/21/2026
Style Loft
Maintenance $8,656/mo

Monthly Costs Estimate

Down Payment 20%

$1,695,000

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 $5M to $9,999,999 at 2.25%, applied to the whole purchase price. It is due in cash at closing and cannot be financed.

Estimated mansion tax at asking

$190,688

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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