# 312 5th Avenue, Brooklyn

Mixed use · 6 units · built c. 1921 · Block 974, Lot 39.

On Umarelli: https://umarelli.org/nyc/3009740039/312-5-avenue

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

Every lot on block 974: https://umarelli.org/nyc/brooklyn/974.md

## Building permits

- Alteration, filed Mar 4, 2024, estimated cost $130K, described as “New multi-split air conditioning units within an existing building. New outdoor condensers in rear yard of building. No change in use or occupancy.”

## Property taxes

- Assessment: $1,340,100
- 2026–27 tax: $30,768
- Market value (city estimate): $2,978,000
- Taxable value: $247,348
- Assessed land: $21,600
- Assessed improvements: $1,318,500

## Zoning

R6A: floor area ratio 2.93 built, 3.00 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