Walnut Creek, CA Noise Ordinances: Amplified Music & Events (2026)

Walnut Creek treats amplified music as a distinct noise source with tighter thresholds than general ambient noise. Under Chapter 4-3, amplified sound must not be plainly audible at any adjacent residential property line between 10:00 PM and 7:00 AM, regardless of decibel level. During daytime hours, amplified sound is subject to the standard 60 dBA residential limit at the receptor's property line. Outdoor restaurant patios in the downtown core (around Broadway Plaza and Locust Street) operate under conditional use permits that typically restrict amplified music to end by 9:00 PM or 10:00 PM. Residential block parties, weddings, and fundraisers with amplification require a Special Event Permit from the Recreation Department when held in city parks, and a Temporary Noise Variance when held on private property with amplification expected to exceed ordinance limits. First-offense enforcement is typically a warning with an immediate volume-reduction order; second offenses carry administrative fines and potential seizure of the amplification equipment if the violation continues after police direction.