# 504 Flatbush Avenue, Brooklyn

Mixed use · 5 units · built c. 1925 · Block 5024, Lot 51.

On Umarelli: https://umarelli.org/nyc/3050240051/504-flatbush-avenue

More construction in Prospect Lefferts Gardens: https://umarelli.org/nyc/brooklyn/prospect-lefferts-gardens.md

## Building permits

- Demolition, filed Feb 10, 2026, estimated cost $10K, described as “Full demolition of a 3-story with cellar masonry building.”
- Demolition, filed Feb 10, 2026, estimated cost $10K, described as “Full demolition of a 3-story with cellar masonry building.”
- Alteration, filed Dec 6, 2024, estimated cost $1K, described as “Support of Excavation application filed in conjunction with Alt-CO NB; job number: B01151502-I1.”
- Major Renovation — Enlargement, filed Nov 10, 2022, estimated cost $350K, 36 units added, 8 stories, described as “Alt 1 application to existing 3 story building,vertical and horizontal enlargement proposed 8 story mixed use building”

## Property taxes

- Assessment: $602,550
- 2026–27 tax: $43,740
- Market value (city estimate): $1,339,000
- Taxable value: $351,638
- Assessed land: $9,450
- Assessed improvements: $593,100

## Zoning

R7-1: floor area ratio 1.22 built, 3.44 allowed by base zoning.

## Recent sales

- May 29, 2025: $4,100,000

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

## Flood zone

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

## In the news

[Permits Filed for 504 Flatbush Avenue in Prospect Lefferts Gardens, Brooklyn](https://newyorkyimby.com/2022/11/permits-filed-for-504-flatbush-avenue-in-prospect-lefferts-gardens-brooklyn.html), New York YIMBY, Nov 12, 2022.

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