# 421 Autumn Avenue, Brooklyn

Two-family · built c. 1910 · Block 4180, Lot 18.

On Umarelli: https://umarelli.org/nyc/3041800018/425-autumn-avenue

More construction in East New York: https://umarelli.org/nyc/brooklyn/east-new-york.md

## Building permits

- New Building — Multi-Family, filed Jul 22, 2026, 5 units, 3 stories, described as “New three (3) story five family semi-attached dwelling.”
- Major Renovation — Residential, filed Jan 19, 2026, 2 units in all, 2 stories, described as “Alteration 01, to modify lot size only”

## Property taxes

- Assessment: $71,280
- 2026–27 tax: $8,520
- Market value (city estimate): $1,188,000
- Taxable value: $42,938
- Assessed land: $28,920
- Assessed improvements: $42,360

## Zoning

R5: floor area ratio 0.34 built, 1.50 allowed by base zoning.

## 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