6714 21st Avenue, Brooklyn
Four-family · built c. 1931 · Block 5571, Lot 40.
Building permits
- Alteration, filed Sep 28, 2023, estimated cost $40K, described as “Renovation of existing cellar, first and second floor with plumbing work:relocate kitchen and bathroom fixtures; new boilers and hot water heaters on cellar; no change in use, egress or occupancy under this application.”
- Alteration, filed Sep 28, 2023, estimated cost $120K, described as “Renovation of existing cellar, first and second floor with general construction: new partitions, doors, flooring and cosmetic work; no change in use, egress or occupancy under this application.”
Property taxes
- Assessment
- $512,100
- 2026–27 tax
- $16,212
- Market value (city estimate)
- $1,138,000
- Taxable value
- $130,329
- Assessed land
- $94,950
- Assessed improvements
- $417,150
Zoning
R5: floor area ratio 1.26 built, 1.50 allowed by base zoning.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Sep 12, 2023: $1,630,000
Open-market sales since 2016, from the Department of Finance’s sales files.