# 124 Martense Street, Brooklyn

Two-family · built c. 1910 · Block 5090, Lot 21.

On Umarelli: https://umarelli.org/nyc/3050900021/124-martense-street

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

## Building permits

- Alteration, filed Oct 21, 2026, estimated cost $1K, described as “Bpp filed herewith for a new sidewalk, curb & roadway filed in conjunction to new building application #B01344552-I1”
- Alteration, filed Sep 6, 2026, estimated cost $5K, described as “Application filed herewith for installation for a temporary construction fence. No change in use, egress or occupancy.”
- Major Renovation — Enlargement, filed Jan 20, 2026, estimated cost $1.8M, 10 units added, 4 stories, described as “Kindly assign this application to central development for review.”

## Property taxes

- Assessment: $63,000
- 2026–27 tax: $7,763
- Market value (city estimate): $1,050,000
- Taxable value: $39,124
- Assessed land: $21,600
- Assessed improvements: $41,400

## Zoning

R7-1: floor area ratio 0.99 built, 3.44 allowed by base zoning.

## Recent sales

- Jul 29, 2025: $1,100,000

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

## Flood zone

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

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