Berkeley Decibel Limits Rules (2026): What You Need to Know

Berkeley Municipal Code Chapter 13.40 establishes quantitative noise standards that supplement the city's general nuisance-based noise prohibitions. Exterior noise limits are defined by the zoning classification of the receiving property and the time of day. For residential zones (R-1 through R-4, and mixed-use zones where residential is the primary use), the daytime limit is 55 dBA measured at the property line of the affected property between 7 AM and 10 PM, and the nighttime limit is 45 dBA from 10 PM to 7 AM. Commercial zones (C-1, C-2, and similar designations) have higher thresholds of 65 dBA daytime and 55 dBA nighttime, while manufacturing and industrial zones are set at 70 dBA at all hours.

Measurements are performed using Type I or Type II sound level meters set to A-weighting and slow response. When noise from a source property crosses into a zone with a lower noise standard, the lower standard of the receiving property applies. This is particularly relevant in Berkeley, where the zoning map creates frequent transitions between commercial corridors (such as Telegraph Avenue, Shattuck Avenue, and University Avenue) and adjacent residential neighborhoods. A restaurant or bar on Shattuck Avenue, for example, must ensure that music and patron noise does not push levels above 55 dBA (daytime) or 45 dBA (nighttime) at the nearest residential property line.

Fixed mechanical equipment — including HVAC units, exhaust fans, generators, and pool or spa pumps — must be installed and operated so that noise at the nearest residential property line does not exceed the applicable standard. Berkeley's Energy and Sustainable Development Department and Code Enforcement Division handle complaints about persistent equipment noise. The Berkeley Police Department addresses acute noise disturbances. Residents can report ongoing noise issues to Code Enforcement at (510) 981-2489 or call the police non-emergency line at (510) 981-5900 for immediate disturbances.