How Brentwood Handles Noise Ordinances: A Practical Guide
Brentwood maintains 85 local ordinances across all categories, and 6 of those deal specifically with noise ordinances. Here is a breakdown of what the city actually requires, what is prohibited, and where Brentwood falls on the strict-to-permissive spectrum compared to other cities.
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.
Key details: Audibility standard: Plainly audible 50 ft or at property line. Nighttime cutoff: 10 PM weekdays. Special events: Permit required from City Clerk. Downtown CUP hours: Typically 10/11 PM end. Code reference: BMC 9.32.
Contact your local code enforcement office for specific penalty information.
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.
Key details: Weekday quiet hours: 10 PM-7 AM. Sunday/holiday quiet hours: 10 PM-8 AM. First offense fine: $100 administrative citation. Repeat violation: Up to $500 or misdemeanor. Reporting: BPD non-emergency (925) 634-6911.
Contact your local code enforcement office for specific penalty information.
Vehicle 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.
Key details: Muffler requirement: CVC §27150. Motorcycle limit: 95 dBA (CVC §23130). Car limit: 80-86 dBA. Audio system: Audible at 50 ft = violation. Typical penalty: Fix-it ticket + $25 fee.
Contact your local code enforcement office for specific penalty information.
Leaf 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.
Key details: Weekday/Saturday: 7 AM-7 PM. Sunday/holidays: 8 AM-6 PM. Applies to: All powered equipment (gas & electric). State law: AB 1346 (no new gas SORE sales). First fine: $100.
Contact your local code enforcement office for specific penalty information.
Construction 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.
Key details: Weekday hours: 7 AM-7 PM. Saturday hours: 8 AM-5 PM. Sunday/holidays: Prohibited. Emergency work: Exempt with notification. Typical fine: $100 first offense.
Contact your local code enforcement office for specific penalty information.
Barking 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.
Key details: Continuous Noise: 30+ minutes = violation. Intermittent: 60+ minutes in 24 hours. Enforcement: CCC Animal Services. Process: Notarized affidavit required.
Warning letter first. Administrative fines $100 to $500. Court-ordered remediation possible. Daily fines for non-compliance.
The Bottom Line
Brentwood's noise ordinances rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Brentwood is broadly strict or permissive.
All of the above reflects Brentwood's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.