Costa Mesa, CA Fire Regulations: Smoke Detectors (2026)
Key Facts
- Smoke Alarms
- Every bedroom + every level
- CO Detectors
- Required with fuel appliances
- New Construction
- Hardwired + interconnected
- Replacement Cycle
- Every 10 years
- Fire Department
- (714) 754-5106
Summary
Costa Mesa enforces California's smoke alarm and carbon monoxide detector requirements under CMMC building codes. Detectors are required in all sleeping areas, outside bedrooms, and on every level of the home, with CO detectors mandatory in homes with fuel-burning appliances.
13113.7. (a) (1) Except as otherwise provided in this section, smoke alarms, approved and listed by the State Fire Marshal pursuant to Section 13114 at the time of installation, shall be installed, in accordance with the manufacturer’s instructions in each dwelling intended for human occupancy. (2) For all dwelling units intended for human occupancy for which a building permit is issued on or after January 1, 2014, for alterations, repairs, or additions exceeding one thousand dollars ($1,000), the permit issuer shall not sign off on the completion of work until the permittee demonstrates that all smoke alarms required for the dwelling unit are devices approved and listed by the State Fire Marshal pursuant to Section 13114. (3) However, if any local rule, regulation, or ordinance, adopted prior to January 1, 1987, requires installation in a dwelling unit intended for human occupancy of smoke alarms which receive their power from the electrical system of the building and requires compliance with the local rule, regulation, or ordinance at a date subsequent to the dates specified in this section, the compliance date specified in the rule, regulation, or ordinance shall, but only with respect to the dwelling units specified in this section, take precedence over the date specified in this section.
Full Breakdown
Costa Mesa follows California Building Code and Health & Safety Code Section 13113.7 requiring smoke alarms in all existing single-family homes and apartments. Detectors must be installed in each sleeping room, outside each sleeping area, and on every story of the home including basements. Carbon monoxide detectors are mandatory per California Health & Safety Code Section 17926 in all dwelling units with fuel-burning appliances, attached garages, or fireplaces. New construction and remodels must install hardwired, interconnected smoke alarms with battery backup. Existing homes must have at least battery-operated smoke alarms. Costa Mesa Fire Department at (714) 754-5106 enforces compliance during inspections and fire investigations. Landlords must provide working detectors to tenants. Smoke alarms should be replaced every 10 years per manufacturer recommendations.
Violations & Fines
Failure to install required detectors violates California Health & Safety Code and local building regulations. Costa Mesa Fire may issue correction notices during inspections. Landlords face civil liability for tenant injuries in units lacking required detectors.
Frequently Asked Questions
Where do I need smoke detectors in my Costa Mesa home?
Do I need a carbon monoxide detector in Costa Mesa?
Are landlords required to provide smoke detectors?
Sources & Official References
Other rules in Costa Mesa
California rules heatmap·Compare Costa Mesa to another location·View the California fire regulations overview
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