Across 427 permits filed since 2025-01-25, the median is $15,001; half of projects fall between $6,000 and $26,950. 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
- ****MARGARET IS WORKING ON THIS**** Above Ground Pool, Wilbar International, Round, 24 Feet Diameter x 52". No heater, no deck for now. CA fee includedTown of Southington · 2026-07-24$3,031
- SETTING A 63 AG LP TANK ON THE REAR OF THE HOME. RUNNING 3/4 INCH BLACK PIPE, LOW PRESSURE, ALONG THE REAR OF THE HOME. TRANSITION TO 3/4' CSST UNDER A DECK INTO THE BASEMENT, AND CONTINUING TO THE 1ST FLOOR COOK STOVE WITH SHUT OFF AND SimsburyTownCT · 2026-07-23$1,656
- Remove existing wood deck. Build new 12' x 30' one level deck. Install 7 new concrete piers/footings- 12 diameter, 42 below the ground level. Install metal plates to all deck piers/ footings. Install 7 supporting posts. Install 1 triple beaTown of Canton · 2026-07-22$43,900
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 deck permits in Hartford County, CT came in between $6,000 and $26,950. We exclude permits under $1,000, jobs filed as whole-house construction, and counties whose building departments don't reliably report valuations.