Across 52 permits filed since 2025-04-30, the median is $26,850; half of projects fall between $9,750 and $132,500. 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 Ulster County, NY actually reported when they pulled permits.
Recent filings
- (5) basement slider vinyl replacement windows same size on existing no alteration to openings (.27 u-factor proposed)Kingston · 2026-10-19$5,125
- Remove section of first floor structural wall as shown on plan and install structural support header/beam to support finished attic floor. Add support columns in basement to transfer loads to new concrete footings.Town of Rosendale · 2026-10-14$10,675
- Construct a 3396 SqFt 2-Story, Single-Family house with 4 Bedrooms, 4.5 Bathrooms, attached 784 SqFt 2-car garage, a 228 SqFt enclosed rear porch and a full unfinished basement. Required Inspections: Footing, Footing Drains, Pre-pour slabHurley · 2026-09-29$550,000
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 Ulster County, NY came in between $9,750 and $132,500. 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