Skip to Content
👀 Your key to touring NYC’s best apartments.
My Inquiries
✨Don’t just browse - start exploring!✨

Turn Favorites
into Tours!

Found a listing you love?
Submit a “Book a Tour” inquiry!

Our team will arrange a private tour for any apartment or building in New York City.
Perfectly tailored to your schedule.

  • Apartments
  • Overview & Photos
  • Maps
  • Ratings & Insider Info
  • Building Specialists
  • Floorplans
  • Sales Data & Comps
  • Similar Buildings
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
Unit #
Beds
Baths
Size
Closing Price
Price / Ft2
Asking Price
Sold on
View Full Sales History

Overview of 904 Union Street

904 Union Street is a pre-war co-op building in Brooklyn's Park Slope neighborhood finished in 1910. Situated at 904 Union Street, between Eighth Avenue and Grand Army Plaza Oval, the building contains 16 units and rises 4 stories. The walk-up building's amenities include: intercom.

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

Amenities

  • Pre War
  • Walk Up
  • Intercom
{ "key" : "AIzaSyDquABdSLhathmwfnoTcYwA1BY6coZZyZk", "lat": 40.67279, "lng": -73.97182, "marker": { "icon": "https://img3.cityrealty.com/neo/i/w/amenities/base.png" } }

  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)
View Full Closing History

Sales Summary

Show:

Sales History by Apartment Size

View Full Closing History
Show:

Pricing Comparison of Similar Buildings

View Detailed Comparison
720 West End Avenue
between West 96th Street & West 95th Street
Riverside Dr./West End Ave.
Upper West Side condos from $995K near Riverside Park and the Hudson River. Occupancy 2025 | 30,000 SF of indoor/outdoor amenities.
Learn More