Across 130 permits filed since 2025-04-25, the median is $13,850; half of projects fall between $9,700 and $16,000. 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 Putnam County, NY actually reported when they pulled permits.
Recent filings
- Installation of a 26kW standby generator (NOTE: Balance of $40.00 due prior to the issuance of a Certificate of Compliance)Town of Patterson · 2026-10-22$15,000
- Installation of 24kw Generac Generator with Transfer SwitchSoutheast · 2026-10-21$13,635
- Installation of aboveground LP tanks with lines to service a generatorTown of Patterson · 2026-10-21$2,317
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 Putnam County, NY came in between $9,700 and $16,000. 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 in ConnecticutStandby generator on Long Island