Across 295 permits filed since 2025-05-02, the median is $17,000; half of projects fall between $5,000 and $60,000. 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 Hartford County, CT actually reported when they pulled permits.
Recent filings
- 1. Basement Drainage & Water Piping 2. Bathroom Rough-In Plumbing 3. Plumbing Venting 4. Finish Plumbing InstallationTown of Granby · 2026-10-30$7,000
- ****DAVE IS ASSIGNED TO THIS **** Wire finished basement to code for outlets, switches, recess lights, carbon monoxide/smoke detector combo, cable, bath vent/light combo/ utility lights, GFI outlet, and electric baseboard heat.Town of Southington · 2026-10-26$4,400
- ***MIKE IS ASSIGNED TO THIS**** Repair finished basement wiring and bring to code. Install new recessed lighting, switches and receptacles. Install 4 wire dryer circuit with GFCI Breaker, washer, drain pump . Rewire water heater, boiler, eTown of Southington · 2026-10-26$10,000
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 Hartford County, CT came in between $5,000 and $60,000. 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
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