420 8th Street, Brooklyn
Three-family · built c. 1889 · Block 1090, Lot 6.
Building permits
- Alteration, filed Nov 4, 2026, estimated cost $76K, described as “Removal of Interior Non-Load Bearing Partitions. Floors: Cellar, Basment, 1st, 2nd, 3rd floors. No Change In Use Egresss or Occcupancy.”
- Alteration, filed Jul 1, 2026, estimated cost $382K, described as “Renovation of interior apartments in an existing 4-family building. Partition work, kitchen and bathroom renovations. New windows/doors.”
Property taxes
- Assessment
- $328,800
- 2026–27 tax
- $13,310
- Market value (city estimate)
- $5,480,000
- Taxable value
- $67,074
- Assessed land
- $42,240
- Assessed improvements
- $286,560
Zoning
R6B (part of the lot is R6A): floor area ratio 2.23 built, above the 2.00 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- May 28, 2026: $4,075,000, 4,080 sq ft ($999 per sq ft)
Open-market sales since 2016, from the Department of Finance’s sales files.
Landmarks
Part of Park Slope Historic District Extension (Historic District). 4 Landmarks Preservation Commission permits are on file.