San Ramon, CA Noise Ordinances: Quiet Hours (2026)

Quiet hours in San Ramon run from 10:00 PM to 7:00 AM, seven days per week, with no separate weekend extension. During quiet hours, the maximum permitted sound level at residential property lines drops to 50 dBA, a 10 dB reduction from daytime standards. Amplified music, power tools, outdoor mechanical equipment (pool pumps, generators, HVAC), and construction activity are all restricted during these hours. The ordinance specifically targets the following nighttime nuisances: party noise audible beyond the property line, barking dogs sustained more than 10 minutes, vehicle stereos operating in driveways or on streets, and home mechanical systems lacking sound attenuation. Residents experiencing nighttime disturbances should contact the Contra Costa County Sheriff non-emergency dispatch at (925) 646-2441. Deputies may issue verbal warnings, written warnings, or administrative citations depending on prior history at the address. The city's code enforcement division can open cases against chronic violators, including landlords whose tenants repeatedly generate disturbances. Common exemptions include emergency repairs to utilities, public safety activities, and city-authorized events at Central Park or the San Ramon Community Center. Homeowners in master-planned communities like Dougherty Valley may also face HOA-imposed quiet hours that are stricter than city rules — HOA enforcement runs parallel to municipal enforcement.