Across 52 permits filed since 2025-01-28, the median is $10,500; half of projects fall between $3,950 and $72,462. 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 New London County, CT actually reported when they pulled permits.
Recent filings
- Wiring for new addition and renovation Relocating service, 200a underground CRS# 28132571Town of Waterford · 2026-07-28$25,000
- Replace the whole panel with a 42 space panel for extra slots in case of new circuit additions and to make sure there are no future problems. Comes will all new breakers.Town of Waterford · 2026-07-17$6,534
- Building addition with associated sitework. (WITH BUILDING PERMIT B-26-301)Town of Waterford · 2026-07-15$205,000
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 home addition permits in New London County, CT came in between $3,950 and $72,462. 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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