# 423 99th Street, Brooklyn

Single family · built 2025 · Block 6131, Lot 12.

On Umarelli: https://umarelli.org/nyc/3061310012/423-99-street

More construction in Bay Ridge: https://umarelli.org/nyc/brooklyn/bay-ridge.md

## Building permits

- New Building — Residential, filed Mar 4, 2024, 1 unit, 2 stories, described as “Propose a detached one-family dwelling with in-house garage.”
- Alteration, filed Nov 5, 2025, estimated cost $16K, described as “Install gas plumbing fixtures in existing 2 story building, plumbing, work as per plan, no change on egress, use, or occupancy.”
- Alteration, filed Oct 2, 2025, estimated cost $1K, described as “Installation of temporary heavy duty sidewalk shed as per plans. No change in use, egress or occupancy. Sidewalk shed shall comply with chapter #33 of 2022 the NYC building code. Live load 300PSF.”
- Demolition, filed Jun 6, 2024, estimated cost $25K, described as “Application filed for hand demo of a detached one story accessory garage, 13' high. Fence filed under separate application”
- Demolition, filed Mar 20, 2024, estimated cost $25K, described as “Application filed for hand demo of a 2 story detached frame house, 26' high. Fence filed under separate application”
- Alteration, filed Dec 12, 2023, estimated cost $3K, described as “File application to install 8' height temporary construction fence. No change to use, egress or occupancy”

## Property taxes

- Assessment: $23,640
- 2026–27 tax: $4,691
- Market value (city estimate): $394,000
- Taxable value: $23,640
- Assessed land: $23,640

## Zoning

R4B: floor area ratio 0.90 built, 1.00 allowed by base zoning.

## Recent sales

- Nov 14, 2023: $1,350,000
- Apr 19, 2022: $990,000

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