Generators in Santa Clara County are allowed for emergency use during PSPS and outages, but routine testing must meet 55/45 dBA limits. Permanent standby units need building permits.
Generator use in unincorporated Santa Clara County is common during PG&E Public Safety Power Shutoff (PSPS) events in the foothills and after wildfire-prevention outages. The County Noise Ordinance (Division B11) applies but contains an emergency exemption for generators operated during active utility outages or natural disasters. Routine weekly testing of permanent standby generators is limited to daytime hours and must comply with the 55 dBA receiving-property limit. Permanent natural-gas or propane standby generators (common in foothill estates along Summit Road and Lexington Reservoir) require a building permit, mechanical permit, and often an electrical permit; installations within 10 feet of a property line typically require an acoustic enclosure rated 60 dBA or lower at 23 feet (the Tier 4 standard). Portable generators during emergencies are not permit-regulated but should be placed to minimize neighbor impact and must be fueled safely per fire code.
Contact your local code enforcement office for specific penalty information.
See how Santa Clara County's generator noise rules stack up against other locations.
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