Last updated on May 9, 2026

321 Union Street

321 Union Street is a four-story, seven-unit condominium built in 2013 at the intersection of Cobble Hill and Carroll Gardens. The building is conveniently located near schools, parks, markets, public transportation, and popular restaurants in the neighborhood.

Recent Sales (2) $1,358 Avg. price/ft²
All Units in Building (7)

Apt. 1B

3 beds

2 baths

1,663 ft²

$1,910,000

$1,149

$1,935,000

Apr 21, 2025

Apt. 4A

2 beds

2 baths

1,061 ft²

$1,663,000

$1,567

$1,495,000

Feb 9, 2023

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Overview of 321 Union Street

321 Union Street is a four-story, seven-unit condominium built in 2013 at the convergence of Cobble Hill and Carroll Gardens. It is a short walk from is only a few blocks from P.S. 58, P.S. 29, Carroll Park, Cobble Hill Park, Union Market, the F and G trains, Borough Hall, and some of the neighborhood's best butchers, bakers, and acclaimed restaurants like Lucali's, Frankie's, La Vara and more.

Doorman

None

Type

Condo

Year Built

1920

Apartments

7 (view all units)

Floors

Neighborhood

Carroll Gardens (Brooklyn)

Min Down

20%

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Area Map StreetView

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at Smith and President 0.14 miles

Sales History

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Editorial Coverage

Alternate Address

321 Union Street

200 East 75th Street

at the southeast corner of Third Avenue

Lenox Hill

A remarkable blend of classicism and contemporary sensibility. Spacious two- to six-bedroom homes on the Upper East Side. Delivery summer 2025

5 beds starting at $17,850,000

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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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321 Union Street

All Apartments For Sale

Overview of 321 Union Street

Maps &3D Aerial Views

Sales History

Sales Summary

Sales History by Apartment Size

Pricing Comparison of Similar Buildings

Editorial Coverage

Alternate Address

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Market Data

Market Insight

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