# 257 Clarkson Avenue, Brooklyn

Apartment building · 8 units · built c. 1910 · Block 5057, Lot 72.

On Umarelli: https://umarelli.org/nyc/3050570072/257-clarkson-avenue

More construction in Flatbush: https://umarelli.org/nyc/brooklyn/flatbush.md

## Building permits

- Alteration, filed Jul 27, 2022, estimated cost $5K, described as “Proposed installation of heavy duty sidewalk shed as per plans. Live load 300 lbs per square feet. Sidewalk shed shall comply with chapter #33 of the NYC building code. No change in use, occupancy, or egress under this application.”
- Alteration, filed Oct 12, 2021, estimated cost $1K, described as “Temporary fence installation”
- Major Renovation — Enlargement, filed Aug 19, 2021, estimated cost $352K, 6 units added, 4 stories, described as “Proposed vertical and horizontal extension 8 family residence, on existing 3 story building with cellar and penthouse.”

## Property taxes

- Assessment: $628,200
- 2026–27 tax: $25,651
- Market value (city estimate): $1,396,000
- Taxable value: $206,217
- Assessed land: $156,150
- Assessed improvements: $472,050

## Zoning

R6: floor area ratio 2.38 built, 2.43 allowed by base zoning.

## Recent sales

- Sep 20, 2021: $875,000

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