239 Union Street, Brooklyn
Four-family · built c. 1920 · Block 338, Lot 39.
Building permits
- Alteration, filed Sep 1, 2026, estimated cost $45K, described as “To file SP sprinkler work in conjunction with DOB Now Build application job#B01277178.”
- Alteration, filed Jul 21, 2026, estimated cost $35K, described as “To file PL work in conjunction with DOB Now Build application job#B01277178.”
- Alteration, filed Nov 17, 2025, estimated cost $10K, described as “To file GC work in conjunction with DOB Now Build job#B01277178. Remove interior non-load-bearing wall only at cel, bas, 001 to 003.”
- Major Renovation — Residential, filed Aug 28, 2025, estimated cost $515K, 1 unit in all, 4 stories, described as “Convert from 4 to 1 dwelling unit. Obtain new c of o.”
Property taxes
- Assessment
- $1,265,400
- 2026–27 tax
- $10,646
- Market value (city estimate)
- $2,812,000
- Taxable value
- $85,583
- Assessed land
- $175,950
- Assessed improvements
- $1,089,450
Zoning
R6B: floor area ratio 1.52 built, 2.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Jan 8, 2026: $4,100,000, 3,484 sq ft ($1,177 per sq ft)
Open-market sales since 2016, from the Department of Finance’s sales files.