781 Union Street: Apartments for Sale & Rent

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Last updated on Jan 20, 2022

781 Union Street

Recent Sales (9) $800 Avg. price/ft²
All Units in Building (8)

Apt. 4R

1 bed

1 bath

700 ft²

$635,000

$907

$650,000

Feb 1, 2021

Apt. 2F

1 bed

1 bath

$655,000

$595,000

May 14, 2020

Apt. 4F

1 bed

1 bath

$612,500 -2%

$625,000

May 17, 2018

Apt. 4F

1 bed

1 bath

$520,000

Jun 17, 2015

Apt. 2F

1 bed

1 bath

$487,000

Jul 11, 2014

Apt. 4R

1 bed

1 bath

700 ft²

$485,000

$693

Apr 5, 2013

Apt. 4F

1 bed

1 bath

$365,000

Dec 1, 2011

Apt. 3R

1 bed

1 bath

$420,000

Sep 24, 2009

Apt. 4F

1 bed

1 bath

$310,000

Feb 9, 2006

View Full Sales History

Overview of 781 Union Street

781 Union Street was built in 1912 and has a total of 8 apartments. Located in Park Slope, 781 Union Street is a short walk to the 2, 3, B, Q and R subway lines.

Doorman

None

Type

Co-op

Year Built

1912

Apartments

8 (view all units)

Floors

Neighborhood

Park Slope (Brooklyn)

Min Down

20%

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Area Map StreetView

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at 4th Ave 0.26 miles

at Flatbush Ave and Park Pl 0.33 miles

at Flatbush Ave 0.38 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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Alternate Address

781 union street

1289 Lexington Avenue

at The Northeast corner of East 86th Street

Carnegie Hill

Refined Residences that Redefine life on Lexington Avenue.

2 beds starting at $3,600,000
4 beds starting at $6,295,000
5 beds starting at $8,250,000

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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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781 Union Street

Overview of 781 Union Street

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Sales History

Why are we displaying the estimated price per room?

Sales Summary

Sales History by Apartment Size

Pricing Comparison of Similar Buildings

Alternate Address

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