Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
655 6TH Avenue #5B

For Sale · Listing by Serhant

655 6TH Avenue #5B

Chelsea, Manhattan

$5,795,000

Interested in this property?
Active For Sale Condo

$5,795,000

$1,939 per sq ft

655 6TH Avenue #5B

Chelsea, Manhattan

O'NEILL BUILDING,

MLS® #RLS20115338

RLS at REBNY

Listing by Serhant

3
Bedrooms
3.5
Baths
2,989
Sq. Ft.
2005
Year Built

Quick Summary

Bedrooms 3
Bathrooms 4 full, 1 half
Living Area 2,989 sq ft
Year Built 2005
Ownership Condo
HOA/Common Charges $4,905/mo
Property Taxes Contact for details
Neighborhood Chelsea
Floor 5 of 7

Property Highlights

  • Views: City Lights, City
  • Exposure: East,North,West facing
  • Style: Loft architecture

Property Details

Type Condo
Ownership Condominium
Total Rooms 6
Baths 3 Full, 1 Half
Floor 5 of 7
View City Lights, City
Exposure East,North,West
Cooling Other
Pets Yes
Year Built 2005
Living Area 2,989 sq ft
Architectural Style Loft
Basement Other
Block/Lot 00796/1337

Listing History

Event Date Price Change
Listed Sep 15, 2026 $5,795,000 -
Currently Sep 15, 2026 $5,795,000 -

Description

Residence 5B at The O'Neill Building is a grandly scaled three-bedroom, three-and-a-half-bathroom corner loft offering 2,989 square feet, soaring 12-foot ceilings, and 28 oversized windows across three exposures. Positioned along the north, east, and west corners of the building, the residence is defined by exceptional volume, natural light, and an expansive layout centered around a dramatic turreted great room. The great room serves as the centerpiece of the home, with proportions that comfortably accommodate multiple seating areas and a substantial formal dining space. Oversized windows frame open city views while original cast-iron columns and wide-plank walnut floors preserve the character of the building's historic loft architecture. The windowed eat-in kitchen offers generous storage and flows directly into the main living and dining spaces. Adjacent to the kitchen are a large pantry and dedicated laundry room. A gracious entry foyer, powder room, and multiple storage closets further enhance the functionality of the home. The corner primary suite offers north and west exposures, a substantial custom walk-in closet, and a windowed en-suite bath with soaking tub, separate shower, dual vanity, and marble finishes. Two additional bedrooms are generously proportioned and each feature en-suite baths. Originally built in 1887 as the Hugh O'Neill Dry Goods Store and reimagined by CetraRuddy as a boutique condominium, The O'Neill Building is one of Flatiron's most distinctive architectural landmarks. The full-service condominium offers a 24-hour doorman, concierge, and a 4,000-square-foot common roof deck with an outdoor kitchen. Located at the intersection of Flatiron and Chelsea, the building is moments from Madison Square Park, Union Square, Whole Foods, Eataly, and some of downtown Manhattan's leading dining, shopping, and cultural destinations, with convenient access to multiple subway lines. A grand-scale Manhattan loft with the space, light, and architectural presence to match.

Features & Amenities

Interior Features

High Ceilings Building None Washer Hookup In Unit

Exterior Features

None

Building Amenities

Elevators

Appliances

Dishwasher Washer Dryer Allowed

Building Information

Financial Details

Common Charges $4,905/mo
RE Taxes Contact for details

Chelsea is the epicenter of New York’s contemporary art world and a hub for innovative architecture. Home to the High Line and Chelsea Market, the neighborhood mixes industrial history with modern luxury. The real estate market here is dominated by high-end condominium developments designed by world-renowned architects, alongside historic pre-war lofts and historic townhouses in the Chelsea Historic District.

Chelsea Live Market Data

View Neighborhood

Active Listings

257

Median Asking Price

$1.90M

Median $/Sqft

$2,012

Avg Days on Market

N/A

New This Week

60

Price Reduced

28%

Sold (30 Days)

47

Median Sale Price

$1.74M

Live data from RLS at REBNY • Updated 9/15/26, 6:15 PM EST

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Location

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655 6TH Avenue #5B, Chelsea, New York County

Building Information

Official NYC property records for this building

1887
Year Built
139 years old
7
Floors
47
Residential Units
C6-2A
Zoning District
Condominiums Historic District: Ladies' Mile Historic District

Tax & Assessment

Assessed Value: $18,935,559
Land Value: $5,812,208
Exemptions: $0

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

Lot Area: 18,452 SF
Building Area: 106,279 SF
Built FAR: 5.76
Allowed FAR: 6.02

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 $4,905 per month. Confirm the exact amount with Milton Coste before making an offer.

This property has 3 bedrooms and 3 full bathrooms and 1 half bathroom.

The listed interior living area is 2,989 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 2005, making it approximately 21 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 Milton Coste for weight limits or breed restrictions.

At the current list price of $5,795,000 for 2,989 sq ft, the asking price per square foot is approximately $1,939. 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: RLS20115338
First Listed: 9/15/2026
On Market: 9/15/2026
Price Changed: 9/15/2026
Contract Date: 9/15/2026

Listing Courtesy of Serhant - Ofier Sarfaty

Listing Contact: (516) 312-9799

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 9/15/2026 at 10:15 PM UTC

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Chelsea Market Update

47 sales last 30 days · $1.90M median · 5.5 months supply

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New listings in this building

Quick Facts

Status Active Type Condo Neighborhood Chelsea Borough Manhattan
County New York
Floor 5 of 7
Year Built 2005
First Listed 9/15/2026
Style Loft
Living Area 2,989 sqft
Common Charges $4,905/mo

Monthly Costs Estimate

Down Payment 20%

$1,159,000

Interest Rate Loading...

Source: Freddie Mac PMMS

Loan Term 30 years

Est. Monthly Payment

$0

Principal & Interest $0
PMI (under 20% down) $0
Common Charges $4,905
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

$130,388

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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