5923 20th Avenue, Brooklyn
Four-family with store · built c. 1931 · Block 5514, Lot 1.
Building permits
- Alteration, filed Jul 28, 2026, estimated cost $9K, described as “Installation of 300PSF sidewalk shed as per plans. All equipment shall comply with ch #33 of the NYC code 2022. No change in use, occupancy or egress under this application.”
- Alteration, filed Jul 27, 2021, estimated cost $10K, described as “Modification to existing gas piping on roof for the replacement of natural gas generator. Generator filed under separate DOB # B00501137. No change in use, egress, or occupancy.”
- Alteration, filed Jul 26, 2021, estimated cost $35K, described as “Replace existing non-emergency generator from existing platform with new non-emergency 50 kw generator on roof. Related plumbing filed under DOB # B00501161. No change in use, egress, or occupancy.”
- Alteration, filed Jul 26, 2021, estimated cost $21K, described as “Modification of existing VERIZON site. Replacement of (6) antennas and (9) RRH units. Installation of (4) microwave dishes.”
Property taxes
- Assessment
- $513,900
- 2026–27 tax
- $15,600
- Market value (city estimate)
- $1,142,000
- Taxable value
- $125,410
- Assessed land
- $139,050
- Assessed improvements
- $374,850
Zoning
R5: floor area ratio 2.40 built, above the 1.50 base zoning allows, which bonuses, transfers or older rules can permit.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.