Across 35 permits filed since 2025-03-07, the median is $25,000; half of projects fall between $10,000 and $83,500. 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 Litchfield County, CT actually reported when they pulled permits.
Recent filings
- electrical wiring for house addition including plugs, fixtures & gfiTown of Watertown · 2026-08-27$2,000
- Repaving an existing driveway and looking to add an extension to the turn around area by the garage as well as tapering the current turn around to the driveway.Town of Watertown · 2026-08-21$11,500
- 1100 Sqft Addition to buildingTown of Watertown · 2026-08-10$100,000
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 Litchfield County, CT came in between $10,000 and $83,500. 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
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