# 230 Clarkson Avenue, Brooklyn

Industrial · built c. 1928 · Block 5066, Lot 23.

On Umarelli: https://umarelli.org/nyc/3050660023/230-clarkson-avenue

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

## Building permits

- New Building — Mid-Rise, filed Sep 2, 2025, 99 units, 10 stories, described as “Proposing 10-story with cellar residential new building”
- Alteration, filed Jul 17, 2026, estimated cost $6K, described as “Installation of temporary personnel hoist as per plans. No change in use, egress or occupancy.”
- Alteration, filed Jul 16, 2026, described as “Installation of temporary sidewalk shed as per plans. No change in use, egress or occupancy.”
- Alteration, filed Apr 21, 2026, described as “Installation of temporary pipe scaffold as per plans. No change in use, egress or occupancy.”
- Alteration, filed Mar 10, 2026, estimated cost $4K, described as “Installation of temporary overhead protection as per plans. No change in use, egress or occupancy.”
- Alteration, filed Oct 31, 2025, estimated cost $160, described as “Proposed construction fence. No change to use, egress or occupancy under this application.”
- Demolition, filed Jul 15, 2025, estimated cost $140K, described as “Full demolition to a one story building”

## Property taxes

- Assessment: $792,450
- 2026–27 tax: $72,228
- Market value (city estimate): $1,761,000
- Taxable value: $665,820
- Assessed land: $405,000
- Assessed improvements: $387,450

## Zoning

R7-1: floor area ratio 0.80 built, 3.44 allowed by base zoning.

## Recent sales

- Jul 10, 2025: $20,000,000

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