Across 61 permits filed since 2025-03-09, the median is $15,000; half of projects fall between $5,975 and $100,000. 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
- ADDITION/ALTERATION - HOUSE ADDITION - (LEFT SIDE OF HOUSE) 712 SQ FT FOR USE OF LIVING/SUN ROOM, WITH FULL WALK OUT, UNFINISHED BASEMENT, REAR DECK 26' x 8' - NO STEPS, FRONT COVERED PORCH 3' X 7' WITH STEPS, AMERICAN STANDARD AIR HANDLTown of Wappinger · 2026-09-03$100,000
- OIL Tank replacement - Replacement of 275-gallon oil tank with a _________ 275-gallon tank and basement renovations in accordance with plan by Donald L. Zeller, Architect dated 24 August 2026 and specifications provided by Dutchess EnvironmTown of Hyde Park · 2026-09-03$8,000
- LAUNDRY ROOM, FULL BATH, EXTRA SINK & CHANGE SINGLE DOOR TO SLIDING DOOR IN EXISTING FINISHED BASEMENTTown of Fishkill · 2026-09-03$134,000
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 $5,975 and $100,000. 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