Across 60 permits filed since 2025-03-07, the median is $7,900; half of projects fall between $4,000 and $15,000. 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 Nassau County, NY actually reported when they pulled permits.
Recent filings
- Exterior Alterations - proposed cellar entrance (and relocation of generator)Lawrence · 2026-08-10$50,000
- RUN GAS LINE TO RELOCATED STANDBY GENERATOR AND ALL APPLICABLE GAS PIPING FOR BOLLA MARKET CONVENIENCE STORE.Rockville Centre · 2026-08-04$1,000
- INSTALL GENERATOR. REFERENCE EP2026-0221 AND FGP2026-0099Rockville Centre · 2026-08-04$5,000
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 Nassau County, NY came in between $4,000 and $15,000. 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