Across 53 permits filed since 2025-03-03, the median is $13,000; half of projects fall between $6,684 and $54,000. 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 White Plains, NY actually reported when they pulled permits.
Recent filings
- ** Legalization ** Provide new wiring for lighting, switching, bathroom exhaust fan, ERV, heat pump, wall heater and TV in finished basement.White Plains · 2026-08-05$8,000
- Legalize installation of one (1) 50-gallon AO Smith hot water heater located in the basement (Model # GCV-50-300; 40,000 BTU; Serial # 1248A000802). Relief valve has been piped down to floor, and chimney breech has been sealed.White Plains · 2026-07-28$1,500
- **LEGALIZE** Electric for Three Sump Pumps: Two (2) in the Garage and One (1) in the Basement.White Plains · 2026-07-27$3,675
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 White Plains, NY came in between $6,684 and $54,000. 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