Across 3,800 permits filed since 2025-01-25, the median is $9,800; half of projects fall between $4,200 and $15,610. 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 Connecticut actually reported when they pulled permits.
Recent filings
- EMERGENCY - Replace 50 gallon electric water heater with a new 50 gallon electric water heater with leak detector valve Your application for a Building Permit has been reviewed for compliance with the 2022 State of Connecticut Building CodeSimsburyTownCT · 2026-07-24$3,063
- Water Heater Install State Water Heater -model: GS6-50-YBVIS -50 gallon power vented -natural gas Your application for a Building Permit has been reviewed for compliance with the 2022 State of Connecticut Building Code. The permit for the pSimsburyTownCT · 2026-07-24$4,000
- Furnish and install one Williamson Oil Furnace model WTB-CLB-105 We will install one Carrier 5 ton outdoor condenser model 37MUHAQ60AA3 with one Carrier 5 ton coil model 45MULAQ60XDX.Town of Granby · 2026-07-24$17,007
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 Connecticut came in between $4,200 and $15,610. 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
Boiler / water heater in New JerseyBoiler / water heater in New YorkBoiler / water heater on Long Island