20 Hancock Street, Brooklyn
Two-family · built c. 1899 · Block 1999, Lot 13.
Building permits
- Alteration, filed Mar 23, 2026, estimated cost $73K, described as “Installation of the sprinkler system in conjunction with GC #B01161203.”
- Alteration, filed Jan 31, 2025, estimated cost $324K, described as “Application filed for conversion from 2 family dwelling to a 5 family dwelling. New certificate of occupancy required. No change on building bulk.”
Property taxes
- Assessment
- $149,280
- 2026–27 tax
- $2,773
- Market value (city estimate)
- $2,488,000
- Taxable value
- $13,973
- Assessed land
- $24,840
- Assessed improvements
- $124,440
Zoning
R6B: floor area ratio 1.77 built, 2.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Feb 25, 2026: $1,250,000, 3,933 sq ft ($318 per sq ft)
Open-market sales since 2016, from the Department of Finance’s sales files.