Across 190 permits filed since 2025-03-10, the median is $11,659; half of projects fall between $6,634 and $19,713. 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 Greenwich, CT actually reported when they pulled permits.
Recent filings
- gas-fired water heater replacement with mixing valve and flood check valveTown of Greenwich · 2026-09-03$7,747
- replace natural gas piping from the gas meter to give generator, one tee for future bbq, then into the house; continue the main in the basement the length of the house supplying one kitchen range, one water heater, one boiler and 2 fireplacTown of Greenwich · 2026-09-02$12,000
- Install 44" stainless steel chimney liner for 2 gas fired water heaters.Town of Greenwich · 2026-09-01$1,989
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 Greenwich, CT came in between $6,634 and $19,713. 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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