363 Kosciuszko Street, Brooklyn
Two-family · built c. 1899 · Block 1782, Lot 46.
Building permits
- Major Renovation — Conversion, filed Jul 10, 2025, estimated cost $1.5M, 2 units added, 5 stories, described as “Proposed horizontal and vertical extension and interior renovation to an existing 3 story residential building converting to a 5 story & 5 unit, residential building.”
- Alteration, filed Jun 5, 2024, estimated cost $41K, described as “Plumbing work. As per plans. No change on use, means of egress or occupancy in this application.”
- Alteration, filed Jun 5, 2024, estimated cost $85K, described as “Interior renovation in existing 2FAMILY 2.sty. Residential building with basement and cellar. No change in use,means of egress or occupancy in this application.”
Property taxes
- Assessment
- $90,840
- 2026–27 tax
- $2,218
- Market value (city estimate)
- $1,514,000
- Taxable value
- $11,176
- Assessed land
- $20,940
- Assessed improvements
- $69,900
Zoning
R6B: floor area ratio 0.88 built, 2.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Mar 18, 2025: $1,290,000
- May 22, 2024: $1,110,000
Open-market sales since 2016, from the Department of Finance’s sales files.