Across 822 permits filed since 2025-03-08, the median is $6,500; half of projects fall between $1,712 and $14,000. 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 Fairfield County, CT actually reported when they pulled permits.
Recent filings
- Install 3-120gal above ground propane tanks with fuel line ran and connected to generator.Town of Weston · 2026-09-04$1,400
- run gas line for generator.Town of Greenwich · 2026-09-04$1,200
- replace existing generator with new Generac 40 kw, same location, 30 ft. of electric including 15 ft. of trenching energizing entire electrical serviceTown of Greenwich · 2026-09-04$83,000
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 Fairfield County, CT came in between $1,712 and $14,000. 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
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