Across 1,223 permits filed since 2025-03-11, the median is $10,500; half of projects fall between $5,102 and $15,000. 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
- Demo of existing 40 gallon indirect water heater and installation of new 80 gallon indirect water heater. Your application for a Building Permit has been reviewed for compliance with the 2022 State of Connecticut Building Code. The permit fSimsbury · 2026-09-08$6,591
- Remove and replace the existing oil furnace in the exact same location and footprint as original with new Daikin brand DR97MC0803B propane furnace, flue pipe and controls. Your application for a Building Permit has been reviewed for compliaSimsbury · 2026-09-08$15,000
- REMOVING EXISTING BOILER - INSTALLING A TWC075 OIL BOILER WITH A TANKLESS COIL.Town of Granby · 2026-09-08$11,596
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 boiler / water heater permits in Hartford County, CT came in between $5,102 and $15,000. We exclude permits under $1,000, jobs filed as whole-house construction, and counties whose building departments don't reliably report valuations.
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