Across 1,694 permits filed since 2025-04-28, the median is $6,500; half of projects fall between $1,950 and $13,000. 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 Connecticut actually reported when they pulled permits.
Recent filings
- INSTALL TWO 120-GALLON ABOVE GROUND PROPANE TANKS WITH FUEL LINE RAN AND CONNECTED TO GENERATOR.Westport · 2026-10-28$2,000
- INSTALL 18 KW AUTO STANDBY GENERATOR.Westport · 2026-10-28$12,000
- 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 Connecticut came in between $1,950 and $13,000. 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
Standby generator in New YorkStandby generator on Long Island