# 309 6th Avenue, Brooklyn

Co-op · 4 units · built 1940 · Block 976, Lot 7.

On Umarelli: https://umarelli.org/nyc/3009760007/309-6-avenue

More construction in Park Slope: https://umarelli.org/nyc/brooklyn/park-slope.md

Every lot on block 976: https://umarelli.org/nyc/brooklyn/976.md

## Building permits

No building permits on file for this lot.

## Property taxes

- Assessment: $1,225,800
- 2026–27 tax: $19,391
- Market value (city estimate): $2,724,000
- Taxable value: $208,411
- Assessed land: $13,950
- Assessed improvements: $1,211,850

## Tax breaks

- Co-op and condo abatement, with no end date, a $6,533 credit this tax year.

## Zoning

R6B: floor area ratio 2.87 built, above the 2.00 base zoning allows, which bonuses, transfers or older rules can permit.

## Recent sales

- Jun 26, 2026: $2,635,000

Open-market sales since 2016, from the Department of Finance’s sales files.

## 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