Last updated on Apr 3, 2026

678 Union Street

Overview of 678 Union Street

678 Union Street is a boutique condominium located in the heart of Park Slope, just off 5th Avenue. This building features a variety of one-bedroom apartments, many of which boast high ceilings, hardwood floors, and modern amenities such as in-unit washers/dryers and spacious kitchens equipped with stainless steel appliances. Residents can enjoy the luxury of a deep soaking Jacuzzi tub in the bathroom, as well as ample closet and storage space throughout the units. The apartments are designed for comfort and convenience, making them ideal for both living and entertaining. The building's prime location offers easy access to public transportation, with the R train just a half block away, providing quick connections to Manhattan. Additionally, the vibrant shopping and dining scene on 5th Avenue is right at residents' doorstep, along with the lush greenery of Prospect Park only a few blocks away. Many units also feature private outdoor spaces, perfect for enjoying the serene atmosphere of the neighborhood. Notably, 678 Union Street is pet-friendly, accommodating a variety of lifestyles. The building's community is enhanced by its shared outdoor spaces, which are perfect for gatherings or quiet moments outdoors. With a range of leasing options available, including fully furnished units for short-term rentals, this building caters to both long-term residents and those seeking temporary stays in one of Brooklyn's most desirable areas.

Doorman

None

Type

Condo

Year Built

1920

Apartments

10 (view all units)

Floors

Neighborhood

Park Slope (Brooklyn)

Min Down

20%

Maps &
3D Aerial Views

View school info, local attractions, transportation options & more.

Experience amazing 3D aerial maps and fly throughs.

Amenities

Pre War

Area Map StreetView

{ "key" : "AIzaSyDquABdSLhathmwfnoTcYwA1BY6coZZyZk", "lat": 40.67646, "lng": -73.9812, "marker": { "icon": "https://img3.cityrealty.com/neo/i/w/amenities/base.png" } }

at 4th Ave 0.12 miles

at Flatbush Ave 0.44 miles

at Flatbush Ave and Park Pl 0.46 miles

Sales History

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

Alternate Address

678 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

4 beds starting at $7,650,000
5 beds starting at $18,500,000

Learn More

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.

CityRealty is committed to ensuring digital accessibility for individuals with disabilities. We are continuously working to improve the accessibility of our web experience for everyone, and we welcome feedback and accommodation requests. If you wish to report an issue or seek an accommodation, please contact us at accessibility@cityrealty.com.

An equal housing opportunity

{"1":[40.775,-73.94,"East Side","_es"],"2":[40.79,-73.99,"West Side","_ws"],"11":[40.76,-73.98,"Midtown","_m"],"3":[40.736,-73.99,"Downtown","_d"],"13":[40.711309,-74.01,"Financial
District\/BPC","_fd"],"4":[40.682676,-73.973007,"Brooklyn","_b"],"12":[40.8444,-73.9376,"Upper Manhattan","_um"],"5":[40.7477089,-73.930411,"LIC \/ Queens","_qns"],"18":[40.8889782,-73.9025,"The Bronx","_bx"]}

Turn Favoritesinto Tours!

678 Union Street

Overview of 678 Union Street

Maps &3D Aerial Views

Amenities

Sales History

Sales Summary

Sales History by Apartment Size

Pricing Comparison of Similar Buildings

Alternate Address

Buy & Sell

Rent

Buildings

Insights

Company

Turn Favorites
into Tours!

Maps &
3D Aerial Views