# 129 23rd Street, Brooklyn

Apartment building · 6 units · built c. 1930 · Block 645, Lot 67.

On Umarelli: https://umarelli.org/nyc/3006450067/129-23-street

More construction in Sunset Park: https://umarelli.org/nyc/brooklyn/sunset-park.md

Every lot on block 645: https://umarelli.org/nyc/brooklyn/645.md

## Building permits

- Alteration, filed Jul 13, 2026, estimated cost $9K, described as “Proposed installation of temporary pipe scaffold as per plans. Work shall comply with chapter #33 of the NYC building code. No change in use, occupancy, or egress under this application.”
- Alteration, filed Jul 13, 2026, estimated cost $9K, 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 Jan 21, 2026, estimated cost $229K, described as “Facade repairs and roof replacement as per plans filed herewith. No change to use, egress or occupancy”
- Alteration, filed Mar 28, 2025, estimated cost $687K, described as “OT: Interior Renovation including replacement of doors, finishes and millwork. Exterior Renovation including replacement of doors, windows, and skylight. No change in use occupancy, or egress.”

## Property taxes

- Assessment: $649,800
- 2026–27 tax: $37,907
- Market value (city estimate): $1,444,000
- Taxable value: $304,740
- Assessed land: $51,750
- Assessed improvements: $598,050

## Zoning

M1-2D: floor area ratio 2.33 built, above the 2.00 base zoning allows, which bonuses, transfers or older rules can permit.

## 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