# 817 8th Avenue, Brooklyn

Apartment building · 8 units · built c. 1911 · Block 1091, Lot 2.

On Umarelli: https://umarelli.org/nyc/3010910002/817-8-avenue

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

Every lot on block 1091: https://umarelli.org/nyc/brooklyn/1091.md

## Building permits

- Alteration, filed Aug 14, 2026, estimated cost $270K, described as “Interior renovation and combination of apartments 3F & 3R on floor 003 and apartments 4F & 4R on floor 004, as per tppn 3/97. No change in use,bulk occupancy or egress.”

## Property taxes

- Assessment: $1,191,600
- 2026–27 tax: $30,998
- Market value (city estimate): $2,648,000
- Taxable value: $249,200
- Assessed land: $23,400
- Assessed improvements: $1,168,200

## Zoning

R7B: floor area ratio 2.69 built, 3.00 allowed by base zoning.

## Recent sales

- Jun 10, 2026: $3,922,500, 5,576 sq ft ($703 per sq ft)
- Jan 16, 2019: $3,600,000, Apt 8

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

## Flood zone

Current FEMA flood map: zone X, minimal flood hazard.

## Landmarks

Part of Park Slope Historic District Extension (Historic District). 3 Landmarks Preservation Commission permits are on file.

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