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UnionBK

305 Union Avenue, Brooklyn, NY 11211

19 units

7 stories

2019 built

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About

UnionBK is a new, green-oriented 19-residence condominium featuring quality modern design, exceptional light and air, and smart amenities in one of Williamsburg’s hottest areas. Parking is available in the building’s on-site garage.

Residences range from studios to three-bedroom homes, including four penthouses, five duplexes, and 14 residences with private terraces and balconies. Many of these homes have sweeping views.

Facts

Development status: Completed
Developer: 307-311 Union Avenue LLC
Architect: Workshop Design & Architecture, PLLC
District: Community District 301City Council District 34Police Precinct 90
Hurricane evacuation zone: Zone 6
Building class: D1
Documents and permits: View documents and permits

Available units

No units available. Check back soon.

Unavailable sales

			Status				Floor plan
08/22/25	#5A	$1,725,000	No longer available on StreetEasy	2 beds	2 baths	1,190 ft²
07/08/25	#5C	$1,750,000	No longer available on StreetEasy	3 beds	2 baths	1,216 ft²
06/27/25	#4D5D	$1,700,000	No longer available on StreetEasy	2 beds	1.5 baths	1,194 ft²
06/11/25	#3C	$1,825,000	Sold (can't find government record)	3 beds	2 baths	1,230 ft²
02/28/25	#4B	$749,000	No longer available on StreetEasy	Studio	1 bath	506 ft²
09/03/24	#4A	$1,700,000	Sold (asking: $1,700,000; 0%)	2 beds	2 baths	- ft²
07/30/24	#2C	$1,849,000	No longer available on StreetEasy	3 beds	2 baths	1,225 ft²
06/18/24	#3A	$1,764,959	Sold (asking: $1,749,000; 0.91%)	2 beds	2 baths	1,189 ft²
03/23/23	#PHA	$2,050,000	Sold (asking: $2,250,000; -8.89%)	3 beds	2 baths	1,597 ft²
06/11/20	#PHB	$1,700,000	No longer available on StreetEasy	2 beds	2 baths	1,243 ft²
04/07/20	#2B	$1,135,000	Sold (can't find government record)	1 bed	1.5 baths	861 ft²
03/17/20	#3D	$800,000	No longer available on StreetEasy	1 bed	1 bath	651 ft²
07/31/19	#2A	$1,500,000	No longer available on StreetEasy	2 beds	2 baths	1,189 ft²
08/26/13		$1,250,000	Recorded closing	-	- baths	- ft²	-

Unavailable rentals

						Floor plan
11/29/25	#2B	$5,795	1 bed	1.5 baths	861 ft²
09/08/25	#4D	$7,050	2 beds	1.5 baths	1,194 ft²
09/08/25	#4C	$7,150	3 beds	2 baths	1,229 ft²
07/09/25	#4B	$3,550	Studio	1 bath	506 ft²
07/30/24	#2C	$7,150	3 beds	2 baths	1,225 ft²
07/08/24	#PH6D	$7,395	3 beds	2 baths	- ft²	-
06/24/24	#5C	$6,950	3 beds	2 baths	1,216 ft²
10/03/23	#5B	$3,450	Studio	1 bath	- ft²
06/09/23	#PHC	$10,950	3 beds	2.5 baths	2,115 ft²
03/06/23	#3D	$3,775	1 bed	1 bath	651 ft²
09/13/22	#4A	$6,500	2 beds	2 baths	1,190 ft²
08/15/22	#5A	$6,100	2 beds	2 baths	- ft²
08/09/22	#2A	$6,450	2 beds	2 baths	1,189 ft²
03/06/22	#PH7D	$2,500	Studio	1 bath	400 ft²
07/23/21	#2D	$2,800	Studio	1 bath	- ft²
06/14/21	#PHD	$2,500	Studio	1 bath	- ft²
07/22/20	#6D	$5,775	3 beds	2 baths	- ft²
06/19/20	#3C	$6,100	3 beds	2 baths	- ft²
04/15/20	#3A	$5,525	2 beds	2 baths	- ft²	-