# 670 Williams Avenue, Brooklyn

Single family · built 2002 · Block 3867, Lot 147.

On Umarelli: https://umarelli.org/nyc/3038670147/670-williams-avenue

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

Every lot on block 3867: https://umarelli.org/nyc/brooklyn/3867.md

## Building permits

- Alteration, filed Apr 28, 2026, estimated cost $124K, described as “Rear extension of one family with 2 story house.”
- Alteration, filed Jun 17, 2025, estimated cost $46K, described as “Installation of stairs to cellar at front and rear of house.”

## Property taxes

- Assessment: $42,180
- 2026–27 tax: $5,452
- Market value (city estimate): $703,000
- Taxable value: $27,432
- Assessed land: $17,640
- Assessed improvements: $24,540

## Tax breaks

- UDAAP exemption, through Jun 30, 2027, about $353 a year below the full tax.

## Zoning

R6: floor area ratio 0.74 built, 2.43 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