403 Jefferson Avenue, Brooklyn
Single family · built c. 1915 · Block 1830, Lot 48.
Building permits
- Alteration, filed Oct 16, 2025, estimated cost $25K, described as “Application for elevated rear deck at ground floor elevation.”
- Alteration, filed Apr 22, 2025, estimated cost $40K, described as “Mechanical work in conjunction with B00765026”
- Alteration, filed Sep 23, 2024, estimated cost $93K, described as “Plumbing work in conjunction with B00765026”
- Alteration, filed Apr 12, 2023, estimated cost $25K, described as “Rep & rel 2 fix bath, repla (1)kitchen sink, (1) dishwasher, prop (4) fixtures, remove & seal (1) stove at basement, prop (4) fixt, remove & seal (4) fixtures at 1st fl, remove cap & seal (2) fix and gas stove, replace (3) fixtures, prop…”
- Alteration, filed Apr 10, 2023, estimated cost $446K, described as “Application file for cellar to be in conjunction with the 1ST & 2ND floor to have control over boiler room equipment. New bathrooms, new kitchens, new flooring over existing. Propose hwh for both units.no change of use, egress or occupancy.”
Property taxes
- Assessment
- $128,520
- 2026–27 tax
- $5,151
- Market value (city estimate)
- $2,142,000
- Taxable value
- $25,960
- Assessed land
- $16,200
- Assessed improvements
- $112,320
Zoning
R6B: floor area ratio 1.20 built, 2.00 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Dec 7, 2023: $2,240,000
- Feb 1, 2022: $2,050,000
Open-market sales since 2016, from the Department of Finance’s sales files.