Across 27 permits filed since 2025-03-03, the median is $12,300; half of projects fall between $3,398 and $84,374. 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 Haven, CT actually reported when they pulled permits.
Recent filings
- Temp Generators and appurtenances Install conduit and wire Modification to existing equipment and gear Temp lighting, GFIs, trailers Make Safe Demo install grounding system as required Install ATS-op and ATS-in install instrumentation cCity of New Haven · 2026-08-18$3,876,016
- Run 1 inch poly pipe in trench from meter to generator . connect with shutoffs.City of New Haven · 2026-08-11$1,800
- Scope of Work: Remove and properly dispose of the existing 150 kW standby generator and associated equipment as required. Furnish and install a new 150 kW diesel-powered standby generator, including all necessary electrical, fuel, exhaust, City of New Haven · 2026-07-31$50,000
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 New Haven, CT came in between $3,398 and $84,374. 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 in ConnecticutStandby generator on Long Island