645 Dekalb Avenue, Brooklyn
Two-family with store · built c. 1931 · Block 1774, Lot 71.
Building permits
- Major Renovation — Enlargement, filed May 18, 2026, estimated cost $756K, 6 units added, 4 stories, described as “Vertical & horizontal enlargement to existing 2 story & basement building.”
Property taxes
- Assessment
- $79,680
- 2026–27 tax
- $2,559
- Market value (city estimate)
- $1,328,000
- Taxable value
- $12,896
- Assessed land
- $6,780
- Assessed improvements
- $72,900
Zoning
R6A: floor area ratio 1.20 built, 3.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Apr 16, 2026: $1,700,000, 2,250 sq ft ($756 per sq ft)
Open-market sales since 2016, from the Department of Finance’s sales files.