124 Martense Street, Brooklyn
Two-family · built c. 1910 · Block 5090, Lot 21.
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.
Flood zone
Current FEMA flood map: zone X, minimal flood hazard.
Recent sales
- Jul 29, 2025: $1,100,000
Open-market sales since 2016, from the Department of Finance’s sales files.