40 East 21st Street - Flatiron/Union Square

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40 East 21st Street

co-op located in Flatiron/Union Square

Recent Sales (2) $1,291 Avg. price/ft²
All Units in Building (1)

Apt. 10D

2 beds

2 baths

$2,999,000

Jul 10, 2024

Apt. 2

2 beds

2 baths

1,781 ft²

$2,300,000

$1,291

Oct 24, 2022

View Full Sales History

Overview of 40 East 21st Street

Built in 1906, 40 East 21st Street is an 11-story pre-war cooperative with 10 residential units. Located in the Flatiron/Union Square area, it offers a central location with easy access to Gramercy Park, Madison Square Park, and Union Square.

The building features a private roof deck shared exclusively by residents, providing an outdoor retreat with city views. Additional conveniences include proximity to major subway lines, including the N, R, and 6 trains, ensuring efficient transportation in all directions.

The surrounding neighborhood is known for its diverse dining scene, with acclaimed restaurants just a short walk away. Union Square’s Greenmarket, as well as Trader Joe’s and Whole Foods, add to the area’s appeal for fresh food and grocery options.

With Flatiron, Nomad, Gramercy, and the Village all within reach, 40 East 21st Street offers a balance of historic charm and modern convenience in one of Manhattan’s most desirable locations.

Year Built

1906

Apartments

Floors

Neighborhood

Flatiron/Union Square (Manhattan)

Min Down

20%

1Apartments

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in Building

Amenities

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Area Map StreetView

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Nearby Subways

at Park Ave 0.11 miles

at Broadway 0.16 miles

at Broadway and 16th 0.26 miles

at 6th Ave 0.35 miles

at 6th Ave and 16th 0.41 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)

View Full Closing History

between Sixth Avenue & Seventh Avenue

Midtown West

Billionaires’ Row residences with park views and hotel services. Elevated one- to four- bed condos from $1.295M. Reduced pricing | Immediate occupancy

1 beds starting at $2,150,000
2 beds starting at $2,995,000

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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. ©2025 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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40 East 21st Street

co-op located in Flatiron/Union Square

Overview of 40 East 21st Street

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