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Costa Mesa · Building on your lot

Home alarm permits and false alarms in Costa Mesa

Costa Mesa's own rules on home alarm permits and false alarms, with the code text for every value.

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Each rule below links to the section of the Costa Mesa Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What Costa Mesa's code says

Costa Mesa code What Costa Mesa's code adds
How long an alarm may sound
  • An audible alarm must shut off within 15 minutes after it starts, by automatic cutoff or manual operation.
    § 11-153 · code text
    It is unlawful for any owner or occupant of real property to have installed or to activate an audible alarm system which does not shut off within a maximum time of 15 minutes from the commencement of activation.
False alarm fees
  • A service charge applies to each false alarm from the third police response or second fire response in 12 months.
    Applies: The city council sets the charge by resolution. New alarm systems are exempt for the first 30 days.
    § 11-160 · code text
    A service charge shall be paid to the City of Costa Mesa by alarm users for each false alarm upon the third response and for each subsequent police response or second response for each subsequent fire response to the location of the alarm system during a twelve-month period in accordance with the fee schedule set by resolution of city council.
False alarms before a fee
  • The first 2 police responses in a 12-month period carry no service charge.
    § 11-160 · code text
    A service charge shall be paid to the City of Costa Mesa by alarm users for each false alarm upon the third response and for each subsequent police response or second response for each subsequent fire response to the location of the alarm system during a twelve-month period in accordance with the fee schedule set by resolution of city council.
  • The first fire response in a 12-month period carries no service charge.
    § 11-160 · code text
    A service charge shall be paid to the City of Costa Mesa by alarm users for each false alarm upon the third response and for each subsequent police response or second response for each subsequent fire response to the location of the alarm system during a twelve-month period in accordance with the fee schedule set by resolution of city council.

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

Do I need a permit for a home alarm in Costa Mesa?

Costa Mesa's code: An audible alarm must shut off within 15 minutes after it starts, by automatic cutoff or manual operation. (§ 11-153); A service charge applies to each false alarm from the third police response or second fire response in 12 months. (The city council sets the charge by resolution. New alarm systems are exempt for the first 30 days.) (§ 11-160).

General information, not legal advice.

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Costa Mesa Municipal Code — full text