Across 128 permits filed since 2025-05-02, the median is $5,470; half of projects fall between $1,975 and $10,850. 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 New London County, CT actually reported when they pulled permits.
Recent filings
- Side of home, set 2-120 gallon above ground propane tanks. Install underground gas line to generator. Generator by others.Montville · 2026-10-29$3,000
- Provide and install a new 200Amp ATS with a 24KW Home Standby generator.Montville · 2026-10-29$24,000
- Install two 120 gallon ASME propane tanks. Tanks to be installed on an engineered concrete pad and strapped down with Minute Man strapping. Install UG gas line from tanks to existing connection to house. Install UG gas line to new generatTown of Waterford · 2026-10-27$3,500
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 standby generator permits in New London County, CT came in between $1,975 and $10,850. 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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