Across 334 permits filed since 2025-01-25, the median is $4,000; half of projects fall between $1,500 and $16,875. 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 Greenwich, CT actually reported when they pulled permits.
Recent filings
- provide wiring for generator: 2 kw.Town of Greenwich · 2026-07-24$12,000
- 38 kw standby generator Meter Existing 400 amp. serv.Town of Greenwich · 2026-07-24$39,000
- replace existing 48 kw generator with new 48 KW model; reconnect existing feeder. ATS and circuitry to remain as is. Existing 400 amp. service. One existing meterTown of Greenwich · 2026-07-24$40,000
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 Greenwich, CT came in between $1,500 and $16,875. 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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