San Diego County, CA Noise from Specific Sources: Car Alarm Limits (2026)
Key Facts
- Cutoff required
- within 15 minutes
- Governing section
- County Code § 36.415
- Enforced by
- Sheriff's Department
- Applies to
- unincorporated area only
Summary
Unincorporated San Diego County requires car alarms to have a working automatic cutoff that silences the alarm within 15 minutes of activation, and lets law enforcement deactivate an alarm that keeps going off.
(b) No motor vehicle owner shall install or have in his or her possession a motor vehicle that is not equipped with a functioning automatic cutoff device that terminates any noise emanating from the alarm within 15 minutes from the time the alarm is activated. (c) Notwithstanding the requirements of this section, a law enforcement officer may deactivate a building or motor vehicle alarm after the alarm is activated.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-141: Administrative: Current through Ord. No. 11007 (N.S.), effective 7-10-26 | Regulatory: Current through Ord. No. 11008 (N.S.), effective 7-24-26).
Full Breakdown
In unincorporated San Diego County, County Code § 36.415(b) makes it unlawful to own or possess a motor vehicle equipped with an alarm that lacks a functioning automatic cutoff device shutting off the noise within 15 minutes of activation. The same section applies the identical 15-minute cutoff rule to burglar alarms on buildings. Subsection (c) authorizes a law enforcement officer to deactivate a triggered building or motor vehicle alarm. The Sheriff's Department has primary responsibility for enforcing this section under § 36.418.
Violations & Fines
Violating the 15-minute cutoff requirement is enforced by the Sheriff's Department as a misdemeanor under the noise chapter; officers may also arrest without a warrant for violations committed in their presence per Penal Code § 836.5.
Frequently Asked Questions
Does San Diego County require car alarms to shut off automatically?
Can police silence a car alarm themselves?
Sources & Official References
Other rules in San Diego County
California rules heatmap·Compare San Diego County to another location·View the California noise from specific sources overview
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