439 Knickerbocker Avenue, Brooklyn
Condominium · 14 units · built c. 1931 · Block 3289, Lot 7501.
Building permits
- Alteration, filed Apr 14, 2022, estimated cost $36K, described as “4 rooftop split system condensing units on existing steel dunnage. All mechanical work filed under DOB #320939400. Filing to obtain certificate of compliance only. No change in use, egress or occupancy.”
- Alteration, filed May 7, 2019, estimated cost $6K, described as “Erect an illuminated business accessory wall sign. No change in use, egress or occupancy. Replacing permit #321543773.”
Property taxes
- Assessment
- $2,192,400
- 2026–27 tax
- $194,454
- Market value (city estimate)
- $4,872,000
- Taxable value
- $2,089,872
- Assessed land
- $112,500
- Assessed improvements
- $2,079,900
- Condo units with their own tax lots
- 2
Zoning
C4-3: floor area ratio 3.99 built, above the 3.40 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.