San Ramon, CA Noise from Specific Sources: Generator Noise (2026)
Key Facts
- Restricted hours
- 8 p.m. to 8 a.m.
- Governing section
- Municipal Code § B6-99
- Permit requirement
- Required for overnight noisy operation
- First-offense fine
- Up to $100
- Emergency-work exemption
- Section B6-85
Summary
San Ramon requires a permit to run an internal combustion engine, including a portable generator, in a way that causes excessive noise between 8 p.m. and 8 a.m. under Municipal Code section B6-99. Running or repairing a noisy generator overnight without that permit is a citable infraction.
It is unlawful for a person to operate or repair an internal combustion engine in the manner which causes excessive noise between the hours of eight p.m. of one day and eight a.m. of the next day without a permit.
Full Breakdown
" A gas or diesel-powered portable generator is an internal combustion engine, so running one loudly overnight, whether for backup power during an outage, a job site, or an event, falls squarely within the section unless the operator holds a permit. The permit itself comes through section B6-84: the city manager or a designee can exempt a specific use from the chapter's requirements on a finding that it is not detrimental to public health, safety and welfare, list conditions on the permit, review it annually, and revoke it for a violated condition; a denial or revocation can be appealed to the city council within 10 calendar days.
Daytime generator noise, and noise from any generator that is not excessive, falls outside section B6-99 itself but can still be reached through the general nuisance standard in section B6-83, which weighs volume, duration, recurrence and proximity to residential sleeping areas. Emergency work needed to protect life or property from imminent danger is separately exempted from the whole chapter under section B6-85.
Violations & Fines
Running a noisy generator overnight without a permit is an infraction under section B6-121, punished per section A1-32 at up to $100 for a first offense, $200 for a second offense within a year, and $550 for each further violation in that year, with each night of continued operation a separate offense. Section B6-122 lets the city pursue chronic generator noise as an abatable public nuisance.
Frequently Asked Questions
Can I run a generator overnight during a power outage in San Ramon?
How do I get a permit to run a loud generator at night in San Ramon?
What's the penalty for an unpermitted noisy generator in San Ramon?
Sources & Official References
Other rules in San Ramon
California rules heatmap·Compare San Ramon to another location·View the California noise from specific sources overview
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