Placer County, CA Noise Ordinances: Vehicle Noise (2026)

030(A) of the county noise article lists 13 categories of sound exempt from the general noise rules, and item 13 covers motor vehicles: a vehicle otherwise compliant with state law operated on a public highway, street, right-of-way or driveway for the purpose of exiting or entering property is exempt from the article. The subsection then draws the line explicitly, stating the exception does not include amplified sound emanating from the vehicle, vehicle alarms or horn-honking. 060, meaning a stereo, alarm or horn audible at a neighboring property line can be compared to the ambient sound level and Table 1's hourly and maximum decibel limits for that time of day.

020, is the Placer County sheriff, the planning director, and/or the health officer, or their designated code enforcement staff. Complaints about vehicle stereo noise, alarms left blaring in a driveway, or repeated horn-honking are handled through this office rather than a separate vehicle code. Because this provision only removes the blanket vehicle exemption for amplified sound, alarms and horns, a passing car or truck using its engine and factory exhaust to enter or leave a residential driveway is not, by itself, a violation, no matter how early or late.