Across 220 permits filed since 2025-01-25, the median is $10,000; half of projects fall between $4,000 and $48,184. 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
- Price is for the replacement of the past its useable lifespan Condenser and Air Handler. New system will be a R454. The line set will be flushed and reused as much as possible. The new Air Handler will be ducted into the same plenum with mBerlinTownCT · 2026-07-22$12,484
- ****MARGARET IS WORKING ON THIS*************** Plumbing for an addition which includes a full bathroom with shower and a bar sink, both on 1st fl.Town of Southington · 2026-07-20$5,000
- *************MIKE IS WORKING ON THIS************* Homeowner to perform electrical installation for a new 20' x 20' residential addition. Work includes installation of new 120V receptacle outlets, lighting outlets/fixtures, switches, and elTown of Southington · 2026-07-20$1,000
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 $48,184. 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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