Santa Clara County, CA Fire Regulations: Smoke Detectors (2026)
Key Facts
- Governing law
- CA Health & Safety Code 13113.7 (state, not local)
- Required locations
- Each bedroom, outside sleeping areas, every level
- Battery type
- Sealed 10-year battery (battery-only units, since 2014)
- CO alarms
- Required with fuel appliances/fireplace/attached garage
- Max fine
- $200 per offense (infraction)
Summary
Smoke alarm requirements in unincorporated Santa Clara County follow California state law: alarms in every bedroom, outside each sleeping area, and on every level, with carbon monoxide alarms where there are fuel-burning appliances or attached garages. Battery-only alarms must use sealed 10-year batteries.
(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.
Full Breakdown
There is no special county smoke-detector ordinance for unincorporated Santa Clara County beyond what state law requires; the controlling rules are in the California Health & Safety Code and the adopted California building/fire codes. 7 requires working smoke alarms in every residential dwelling unit, installed in each bedroom, outside each sleeping area, and on each level including basements. Since July 1, 2014, the State Fire Marshal has required that solely battery-powered smoke alarms contain a non-replaceable, non-removable battery capable of lasting at least ten years.
Carbon monoxide alarms are required (under the Carbon Monoxide Poisoning Prevention Act) in all dwellings that have a fuel-burning appliance, a fireplace, or an attached garage. For rented single-family homes, the owner is responsible for testing and maintaining the alarms and must give tenants written notice before entering to install, repair, test, or maintain them. New construction and major alterations must also meet the hard-wired, interconnected alarm provisions of the California Residential and Building Codes as adopted by the county. A violation of the smoke-alarm statute is an infraction punishable by a fine of up to $200 per offense.
Because unincorporated Santa Clara County includes substantial wildland-urban interface, properly maintained smoke and CO alarms are part of the broader fire-safety expectation, along with monthly testing and annual battery checks recommended by the county fire department.
Violations & Fines
A violation of Health & Safety Code 13113.7 is an infraction punishable by a maximum fine of $200 per offense. Landlords who fail to maintain alarms in rented dwellings can face additional liability. Building/fire-code alarm provisions are enforced at permitting and inspection.
Frequently Asked Questions
Does unincorporated Santa Clara County have its own smoke-detector law?
Do I need a carbon monoxide alarm?
Sources & Official References
Other rules in Santa Clara County
California rules heatmap·Compare Santa Clara County to another location·View the California fire regulations overview
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