646 Ninth Avenue: Apartments for Sale & Rent

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Last updated on Dec 8, 2025

646 Ninth Avenue

646 Ninth Avenue is a pre-war co-op building in Manhattan's Midtown West neighborhood, completed in 1930 with 15 units across 5 stories. The building offers amenities such as basement storage, in-building washer/dryer, and a live-in superintendent.

Recent Sales (2) $870 Avg. price/ft²
All Units in Building (15)

Apt. 3FN

1 bed

1 bath

500 ft²

$435,000 -3.3%

$870

$450,000

Oct 3, 2023

Apt. 2/3FS

$785,000

Jan 13, 2023

View Full Sales History

Overview of 646 Ninth Avenue

646 Ninth Avenue is a pre-war co-op building in Manhattan's Midtown West neighborhood finished in 1930. Situated at 646 Ninth Avenue, between West 45th Street and West 46th Street, the building contains 15 units and rises 5 stories. The building's amenities include: basement storage, washer/dryer in building and live-in superintendent.

Doorman

None

Type

Co-op

Year Built

1930

Apartments

15 (view all units)

Floors

Pets: Allowed

Neighborhood

Midtown West (Manhattan)

Min Down

20%

Maps &
3D Aerial Views

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Amenities

Pre War
Resident Storage
Washer/Dryer in building
Live-In Superintendent

Area Map StreetView

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at 8th Ave and 44th 0.22 miles

Sales History

Price/Room (Est)

Why are we displaying the estimated price per room?

For some co-ops, instead of price per square foot, we use an estimate of the number of rooms for each sold apartment to chart price changes over time. This is because many co-op listings do not include square footage information, and this makes it challenging to calculate accurate square-foot averages.

By displaying the price per estimated room count, we are able to provide a more reliable and consistent metric for comparing sales in the building. While we hope that this gives you a clearer sense of price trends in the building, all data should be independently verified. All data provided are only estimates and should not be used to make any purchase or sale decision.

Price/Ft² (Est)

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Sales Summary

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Sales History by Apartment Size

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Pricing Comparison of Similar Buildings

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Editorial Coverage

Alternate Address

646 9 Avenue

Bergen Brooklyn

between 3rd Avenue & 4th Avenue

Boerum Hill

World-class design, rooted in local charm. Crafted facade by Frida Escobedo | Textured interiors by Workstead. Early 2025 Occupancy.

Studios starting at $895,000
1 beds starting at $1,125,000
2 beds starting at $2,750,000
3 beds starting at $2,925,000
4 beds starting at $5,350,000
5 beds starting at $5,850,000

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RLS IDX Data display by CityRealty.com, LLC. This 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. IDX information is provided exclusively for consumers’ personal, non-commercial use and it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

All information furnished regarding property for sale, rental or financing is from sources deemed reliable, but no warranty or representation is made as to the accuracy thereof and same is submitted subject to errors, omissions, change of price, rental or other conditions, prior sale, lease or financing or withdrawal without notice. All dimensions are approximate. For exact dimensions, you must hire your own architect or engineer and for no listing shall the number of bedrooms listed be considered a legal conclusion.

All closed sales data has been provided by the New York City Department of Finance via the Automated City Register Information System (ACRIS). No warranty or representation is made as to the accuracy of any data provided by ACRIS or any other sources.

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An equal housing opportunity

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646 Ninth Avenue

Overview of 646 Ninth Avenue

Maps &3D Aerial Views

Amenities

Sales History

Why are we displaying the estimated price per room?

Sales Summary

Sales History by Apartment Size

Pricing Comparison of Similar Buildings

Editorial Coverage

Alternate Address

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