Across 70 permits filed since 2025-04-24, 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 on Long Island actually reported when they pulled permits.
Recent filings
- The installation of a wireless communication facility on the roof of an existing two (2) story building to receive (12) proposed antennas, (6) proposed RRHS and (3) proposed MDB's secured to proposed antenna mounting assembly behind proposeVillage of Mineola · 2026-10-23$320,000
- MECHANICAL RES. POOL EQUIPMENT - Install gas heater, chlorine generator, super pump, filter and auto coverVillage of Garden City · 2026-10-23$40,000
- Residential Generator - Installation of 26 Kw standby generatorVillage of Garden City · 2026-10-08$10,000
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 on Long Island 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 Connecticut