Noise from Specific Sources in Marin County, CA (2026)
2 county-level rules, plus city-specific rules for 1 city in Marin County, California.
Verified from official government sources
Car Alarm Limits
Marin County Code § 6.70.030(1) makes it unlawful to sound a car horn or other vehicle signaling device except as a danger warning, to make it produce an unreasonably loud or harsh sound, or to let it sound for an unnecessary and unreasonable period of time. The county has no separate car-alarm statute; a malfunctioning or prolonged alarm is enforced under this same horn-and-signaling-device provision.
Marin County Vehicle Horn and Alarm Noise Rule
Light RestrictionsMarin County Code of Ordinances § 6.70.030(1)
(1)Horns, signaling devices, etc. The sounding of any horn or signaling device on any automobile, motorcycle or other vehicle on any road or public place, except as a danger warning; the creation by means of any such signaling device of any unreasonably loud or harsh sound; and the sounding of any such device for an unnecessary and unreasonable period of time;
Generator Noise
Marin County Code § 6.70.030(5)(b) limits loud noise-generating construction equipment, including backhoes, generators, and jackhammers, to running only between 8 a.m. and 5 p.m., Monday through Friday, on projects permitted by the Community Development Agency. That's a tighter window than the general construction-hours schedule, which allows work later on weekdays and on Saturday.
Marin County Generator and Equipment Noise Hours
Some RestrictionsMarin County Code of Ordinances § 6.70.030(5)(b)
b.Loud noise-generating construction-related equipment (e.g., backhoes, generators, jackhammers) can be maintained, operated, or serviced at a construction site for permits administered by the community development agency from eight a.m. to five p.m. Monday through Friday only.
Noise from Specific Sources by City in Marin County
1 cities in Marin County have their own noise from specific sources rules. Each link goes to that city's dedicated page with code citations.
All Marin County ordinances
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