Across 33 permits filed since 2025-01-25, the median is $9,000; half of projects fall between $5,000 and $80,000. 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 Dutchess County, NY actually reported when they pulled permits.
Recent filings
- FINISH BASEMENT - FOR USE AS MULTIMEDIA LOUNGE SPACE AND EXERCISE SPACE *NOT TO BE USED AS AN APARTMENT WITHOUT ZONING APPROVALS** **NEED PASSING FINAL ELECTRICAL INSPECTION BY TOWN APPROVED ELECTRICAL INSPECTOR** **NEED INSPECTION FOR STown of Wappinger · 2026-07-17$32,000
- DECK - EXISTING REAR REPLACE RAILINGS AND STAIRS & PARTIAL FINISHED BASEMENT (REC ROOM) - W/ELECTRIC **NEED PASSING FINAL ELECTRICAL INSPECTION BY TOWN APPROVED ELECTRICAL INSPECTOR** **NEED INSPECTION FOR SMOKE AND CO DETECTORS PER CODE Town of Wappinger · 2026-07-15$10,000
- LEGALIZATION- BONUS ROOM OVER GARAGE INTO TWO BEDROOMS (BATHROOM WITH SHOWER IN EACH BEDROOM) FINISHED BASEMENT (PLAYROOM W/ WET BAR AND FULL BATHROOM AND STORAGE ROOM (NOT HABITABLE SPACE), REPLACED WATER HEATER *NOT TO BE USED AS AN APARTTown of Wappinger · 2026-07-09$30,000
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 Dutchess County, NY came in between $5,000 and $80,000. 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