Across 38 permits filed since 2025-01-25, the median is $23,500; half of projects fall between $8,500 and $81,500. 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
- Construction of front porch additionTown of Watertown · 2026-07-22$10,000
- foundation for mixed use addition (50'x44') 2,200 sf 2 retail spaces and 2 apartmentsTown of Watertown · 2026-07-16$22,000
- demolition partially existing room and build two additions 20x16 and 26x26Town of Watertown · 2026-07-15$265,000
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 $8,500 and $81,500. 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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