223 South 4th Street, Brooklyn
Two-family · built c. 1899 · Block 2433, Lot 37.
Building permits
- Major Renovation — Enlargement, filed Nov 4, 2026, estimated cost $673K, 4 units added, 4 stories, described as “Herewith to propose horizontal and vertical enlargement of an existing 3-story, 2 family building to a 4-story, 6 family dwelling with cellar,stair bulkhead and community facility use at the first floor. New certificate of occupancy to be…”
Property taxes
- Assessment
- $139,740
- 2026–27 tax
- $3,882
- Market value (city estimate)
- $2,329,000
- Taxable value
- $19,561
- Assessed land
- $18,960
- Assessed improvements
- $120,780
Zoning
R6: floor area ratio 1.26 built, 2.43 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Jul 20, 2026: $1,950,000, 2,400 sq ft ($813 per sq ft)
Open-market sales since 2016, from the Department of Finance’s sales files.