Across 74 permits filed since 2025-03-08, the median is $3,100; half of projects fall between $1,437 and $10,000. 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 Middlesex County, CT actually reported when they pulled permits.
Recent filings
- *Supply and installation of 22 kw Generac stand by generator. TRANSFER SWITCH WILL BE LOCATED IN THE BASEMNT. Separation of ground and neutrals in main panel which is now a sub .Town of Westbrook · 2026-08-27$11,750
- Installation of new 18 KW generator with transfer swtichHaddam Neck · 2026-08-21$10,000
- Installation of (2) 120 gallon propane tanks and run lin to generatorHaddam Neck · 2026-08-18$1,100
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 Middlesex County, CT came in between $1,437 and $10,000. 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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