Trinity County, CA Fire Regulations: Smoke Detectors (2026)

There is no separate Trinity County smoke-detector ordinance; the county is governed by California's statewide alarm laws. Under Health and Safety Code section 13113.7, smoke alarms are required in every 'dwelling unit intended for human occupancy,' including single-family homes, duplexes, apartments, condominiums, hotels, motels, and lodging houses. Section 13113.8 requires that every single-family dwelling sold have an operable smoke alarm approved and listed by the State Fire Marshal and installed per the State Fire Marshal's regulations, and sellers must give buyers a written statement of compliance before transfer. Statewide building standards require smoke alarms in each sleeping room, in the area outside each sleeping area, and on every story of the dwelling. Since 2014-2015, solely battery-operated smoke alarms sold in California must use a non-replaceable 10-year sealed battery, display the manufacture date, and include a hush feature. Carbon monoxide alarms are required under the Carbon Monoxide Poisoning Prevention Act of 2010 (HSC 13260 and following) in dwelling units that have a fossil-fuel-burning heater or appliance, a fireplace, or an attached garage - a common configuration in Trinity County's wood-heat and propane households. CO devices must be approved and listed by the State Fire Marshal. In rentals, the owner is responsible for ensuring alarms are present and operable when a tenant takes possession. These are floor standards; CAL FIRE and the local building department enforce them in the unincorporated county.