Across 159 permits filed since 2025-03-08, the median is $11,000; half of projects fall between $4,000 and $60,590. 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
- Wiring for new Addition on the back of the house. 4 cans center fan and outside light. We will add one outside plug as well. New 20 amp AFCI plug circuit and lighting to come off existing. We will also correct the pool bonding by adding a sBerlin · 2026-09-04$2,500
- ****MIKE IS ASSIGNED TO THIS**** New wiring for a room addition, plugs to code and lights.Town of Southington · 2026-08-28$1,000
- Wire new addition also gut and rewire existing houseTown of Southington · 2026-08-25$15,000
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 Hartford County, CT came in between $4,000 and $60,590. 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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