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904 Union Street
Last updated on Oct 12, 2025

904 Union Street

904 Union Street is a pre-war co-op building in Brooklyn's Park Slope neighborhood, completed in 1910. The 4-story walk-up building contains 16 units and features an intercom system.

904 Union Street Location Map

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Overview of 904 Union Street

904 Union Street is a charming pre-war co-op building located in Brooklyn's Park Slope neighborhood, completed in 1910. This four-story walk-up features 16 units and offers a range of amenities, including an intercom system and free laundry facilities in the basement. The building is self-managed and well-maintained, boasting strong financials and low common charges.

The apartments at 904 Union Street are characterized by their classic pre-war details, such as high ceilings, original hardwood floors, and decorative mantles. Many units feature spacious layouts with large windows that provide ample natural light. Notable features include updated kitchens with stainless steel appliances, in-unit laundry options, and generous storage spaces. Some apartments also offer unique layouts, such as duplexes and triplexes, which enhance the feeling of living in a private townhouse.

Residents enjoy a prime location just steps from Prospect Park and Grand Army Plaza, with easy access to multiple subway lines (2/3 and B/Q) and local amenities, including the Brooklyn Public Library and the Park Slope Food Coop. The building is also zoned for PS 321, making it an attractive option for families. Pets are considered on a case-by-case basis, adding to the building's appeal for pet owners.

While there are no notable celebrity residents currently associated with 904 Union Street, the building's historical charm and desirable location make it a sought-after address in one of Brooklyn's most vibrant neighborhoods.

Doorman
None
Type
Co-op
Year Built
1910
Apartments
Floors
4
Neighborhood
Min Down
20%

Amenities

  • Pre War
  • Walk Up
  • Intercom
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  1. 2
  2. 3
at Flatbush Ave and Plaza Street East 0.17 miles
  1. B
  2. Q
at Flatbush Ave and Park Pl 0.30 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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