Across 51 permits filed since 2025-01-25, the median is $212,001; half of projects fall between $46,240 and $512,599. Figures are permit valuations reported to building departments. National cost guides answer this question with averages from other markets; these numbers are what homeowners in Bronx County, NY actually reported when they pulled permits.
Recent filings
- FILING TO LEGALIZE EXIST. TOILET, LAV, AND UTILITY SINK AT BASEMENT. REMOVAL OF EXIST. SHOWER STALL. FILING IN CONJUNCTION WITH JOB #X01383017-I1Bronx · 2026-07-17$1,000
- Renovation of unit #GRF on basement floor, unit 1A on first floor and unit 2A due to fire. Replace partitions, ceiling and flooring. No change in use, egress or occupancyBronx · 2026-07-14$253,750
- PROPOSED INTERIOR RENOVATION TO EXISTING 3 STORY, BASEMENT & CELLAR RESIDENTIAL USE BUILDING CONVERTING INTO A TOTAL OF 10 RESIDENTIAL UNITSBronx · 2026-06-30$668,032
How to read these numbers
Permit valuations are the project cost the applicant reports to the building department. They skew slightly low — nobody rounds up for the permit fee — and scope varies, so the middle-half range is the honest picture: half of all basement finishing permits in Bronx County, NY came in between $46,240 and $512,599. We exclude permits under $1,000, jobs filed as whole-house construction, and counties whose building departments don't reliably report valuations.
Same project, other places
Basement finishing in New YorkBasement finishing in ConnecticutBasement finishing on Long Island