Noise Ordinances in Brentwood, CA (2026)
6 verified noise ordinances for Brentwood, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Quiet Hours
Brentwood's quiet hours run from 10:00 PM to 7:00 AM on weekdays and Saturdays, and 10:00 PM to 8:00 AM on Sundays and holidays. During these hours, amplified sound, power tools, and other loud activity audible at the property line is prohibited under BMC Chapter 9.32.
Noise: Quiet Hours
Some RestrictionsConstruction Hours
Construction activity in Brentwood is permitted Monday through Friday from 7:00 AM to 7:00 PM and Saturdays from 8:00 AM to 5:00 PM. Construction is prohibited on Sundays and federal holidays. Interior work that produces no audible noise at the property line may be allowed outside these hours.
Noise: Construction Hours
Some RestrictionsBarking Dogs
Barking dogs fall under the Contra Costa County Noisy Animal Ordinance (Code §416-12.202). Noise for 30 continuous minutes or 60 minutes intermittently in 24 hours constitutes a violation.
Brentwood Barking Dog Regulations
Some RestrictionsLeaf Blower Rules
Powered lawn and gardening equipment in Brentwood may be operated from 7:00 AM to 7:00 PM on weekdays and Saturdays, and from 8:00 AM to 6:00 PM on Sundays and holidays. Electric and battery-powered equipment must still comply with these hours under BMC Chapter 9.32.
Noise: Lawn Equipment Hours
Some RestrictionsCal. Health & Safety Code § 41015 (AB 1346, 2021)
small off-road engines, as defined by the state board. The bill would require the state board to identify and, to the extent feasible, make available funding for commercial rebates or similar incentive funding as part of any updates to existing applicable funding program guidelines to local air pollution control districts and air quality management districts to implement to support the transiti...
Amplified Music & Events
Amplified music audible beyond the property line after 10:00 PM is prohibited in Brentwood under BMC Chapter 9.32. Outdoor events with amplified sound require a Special Event Permit from the city, and commercial venues in the downtown area operate under conditional use permit noise limits.
Noise: Amplified Music
Some RestrictionsVehicle Noise
Vehicle noise in Brentwood is regulated primarily through California Vehicle Code §27150 (adequate muffler) and §23130 (decibel limits), enforced by Brentwood Police. Modified exhaust, engine revving, and audio systems audible at 50 feet can result in citations and fix-it tickets.
Noise: Vehicle Noise
Some RestrictionsLooking for Contra Costa County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Brentwood city rules.
Noise Ordinances in Contra Costa County →