# 5912 21st Avenue, Brooklyn

Two-family · built 2005 · Block 5514, Lot 41.

On Umarelli: https://umarelli.org/nyc/3055140041/5912-21-avenue

More construction in Borough Park: https://umarelli.org/nyc/brooklyn/borough-park.md

Every lot on block 5514: https://umarelli.org/nyc/brooklyn/5514.md

## Building permits

- Alteration, filed Dec 24, 2025, estimated cost $2K, described as “Filing for proposed concrete parking pad and exterior wall adjustment. Work as per plan. Filing for plan layout details in conjunction to Alteration CO adding a fourth floor to the existing 3 story building. Filing to comply with violation…”
- Alteration, filed Dec 24, 2025, estimated cost $2K, described as “Filing for curbcut application.”
- Alteration, filed Nov 6, 2025, estimated cost $1K, described as “Proposed installation of temporary pipe scaffold as per plans. Work shall comply with chapter #33 of 2022 the NYC building code. No change in use, occupancy, or egress under this application.”

## Property taxes

- Assessment: $205,200
- 2026–27 tax: $23,008
- Market value (city estimate): $3,420,000
- Taxable value: $115,949
- Assessed land: $35,340
- Assessed improvements: $169,860

## Zoning

R5: floor area ratio 1.73 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.

From New York City and Jersey City public records, refreshed within a day of each release. Sources: https://umarelli.org/sources. Methodology and corrections: https://umarelli.org/methodology