174 12th Street, Brooklyn
Single family · built c. 1899 · Block 1027, Lot 18.
Building permits
- Alteration, filed Jul 1, 2026, estimated cost $10K, described as “Install temporary construction fence for alt-NB job(#B01372489) with facade work.”
- Major Renovation — Conversion, filed Apr 1, 2026, estimated cost $1.1M, 3 units added, 4 stories, described as “Proposed two story vertical & horizontal enlargement with penthouse on existing 2-story residential building.convert existing 1-dwelling units into 4-dwelling units.obtain new certificate of occupancy.”
Property taxes
- Assessment
- $103,860
- 2026–27 tax
- $3,889
- Market value (city estimate)
- $1,731,000
- Taxable value
- $19,601
- Assessed land
- $20,940
- Assessed improvements
- $82,920
Zoning
R6B: floor area ratio 0.69 built, 2.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Sep 3, 2026: $2,100,000, 1,716 sq ft ($1,224 per sq ft)
Open-market sales since 2016, from the Department of Finance’s sales files.