Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
434 W 20TH Street #9
Interested in this property?
Active For Sale Co-op

$975,000

434 W 20TH Street #9

Chelsea, Manhattan

MLS® #RLS20089380

RLS at REBNY

Listing by Brown Harris Stevens Residential Sales LLC

Open Houses Scheduled

Friday, May 8 • 4:00 PM – 6:00 PM

Sunday, May 10 • 3:00 PM – 4:30 PM

REBNY 2025: signed Buyer Representation Agreement required before any showing.

1

Bedroom

1

Bath

N/A

Sq. Ft.

1920

Year Built

Quick Summary

Bedrooms 1
Bathrooms 1
Year Built 1920
Ownership Co-op
Maintenance $2,015/mo
Neighborhood Chelsea
Floor 5

Property Highlights

  • Views: City, Park Greenbelt
  • Exposure: South,West facing
  • Style: WalkUp architecture

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 3
Baths 1 Full
Floor 5
View City, Park Greenbelt
Exposure South,West
Pets Yes
Year Built 1920
Architectural Style WalkUp
Basement Other
Parcel # 0717-0061-00434-000-0000009
Block/Lot 00717/0061

Listing History

Event Date Price Change
Listed Apr 23, 2026 $975,000 -
Currently May 6, 2026 $975,000 -

Description

434 West 20th Street, a 25-foot-wide Italianate brownstone built in 1856, is located on one of Chelsea's most picturesque, tree-lined blocks within the Historic District, directly across from the beautifully landscaped gardens of the General Theological Seminary.

This bright, top-floor one-bedroom home features 10-foot ceilings, a skylight, and two west-facing windows that fill the space with natural light. The open kitchen offers generous cabinet and counter space, along with a convenient breakfast bar. A wood-burning fireplace adds warmth and character to the living area.

French doors lead to a tranquil bedroom with southern exposure, treetop views, a walk-in closet, and additional storage. The en-suite marble bathroom also enjoys southern light and features a windowed shower.

A spiral staircase leads to a truly exceptional private roof terrace-nearly the size of the apartment itself and a rare find in Chelsea. This expansive outdoor oasis offers sweeping skyline views, with ample space for dining, lounging, and entertaining. Fully furnished and equipped with electricity and water, it serves as a seamless extension of the home-ideal for everything from quiet mornings to sunset gatherings.

Additional features include split-system air conditioning, two entry closets, a mudroom area, and a dedicated basement storage unit.

This boutique, self-managed seven-unit walk-up co-op is well maintained and offers a video intercom system and a laundry room with complimentary washer and
dryer. As a small, shareholder-run building, policies are in place to preserve its intimate character; subletting, pied-à-terre ownership, co-purchasing, and gifting are not permitted. 80% financing allowed.

Can be combined with Unit 7 on the floor below, which is also available for sale.

Features & Amenities

Interior Features

Building None

Exterior Features

Private Outdoor Space Under60 Sqft

Financial Details

Maintenance $2,015/mo

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

322

Median Asking Price

$1.72M

Median $/Sqft

$1,750

Avg Days on Market

N/A

New This Week

30

Price Reduced

27%

Sold (30 Days)

36

Median Sale Price

$2.05M

Live data from RLS at REBNY • Updated 5/6/26, 6:23 PM EST

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Location

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434 W 20TH Street #9, Chelsea, New York County

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1945
Year Built
81 years old
13
Floors
8764
Residential Units
R7-2
Zoning District
Elevator Apartments

Tax & Assessment

Assessed Value: $790,924,050
Land Value: $117,450,000
Exemptions: $0

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

Lot Area: 2,675,000 SF
Building Area: 8,942,176 SF
Built FAR: 3.34
Allowed FAR: 3.44

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 $2,015 per month. Confirm the exact amount with the listing broker before making an offer.

This property has 1 bedroom and 1 full bathroom.

According to MLS records, the building was constructed in 1920, making it approximately 106 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 the listing broker 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: RLS20089380
First Listed: 5/6/2026
On Market: 4/23/2026
Price Changed: 5/6/2026
Contract Date: 5/6/2026

Listing Courtesy of Brown Harris Stevens Residential Sales LLC - Debra Solomon Pendleton

Listing Contact: (212) 381-3298

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 5/6/2026 at 10:23 PM UTC

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