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

Smoke-detector requirements in unincorporated Alpine County come from the statewide building and fire codes that the county adopts, not from a stand-alone local rule. County Code section 15.04.020 adopts by reference the California Building Standards Code (Title 24), including the 2021 International/2022 California Building Code, the California Residential Code, and the 2021 International Fire Code as adopted and amended into the 2022 California Fire Code (Title 24, Part 9). Those codes carry the smoke-alarm provisions for new and substantially remodeled dwellings — generally requiring alarms in each sleeping room, outside each sleeping area, and on every level, with interconnection and (in new construction) hardwiring with battery backup. Separately, California state law requires smoke alarms in all dwelling units (Health & Safety Code 13113.7 and 13113.8) and carbon monoxide alarms in dwellings with fuel-burning appliances, fireplaces, or attached garages (Health & Safety Code 17926, the Carbon Monoxide Poisoning Prevention Act). California's Move-In/Move-Out rules also require approved smoke alarms when a single-family home is sold. Because Alpine County is high-elevation and heavily reliant on wood stoves and propane heating, working smoke and CO alarms are especially important. The county's building official enforces the adopted codes through the permit and inspection process under Title 15. The county code does not state an alarm count or spacing of its own, so the adopted California codes and state statutes control.