Larimer County has no separate smoke-detector ordinance; smoke alarms are required through the building codes the county adopts (the International Residential and Building Codes), which mandate alarms in bedrooms, outside sleeping areas and on every level of a home.
The county's Building Division enforces the adopted International Residential Code and International Building Code for construction in the unincorporated county. These codes (IRC Section R314) require smoke alarms in each sleeping room, outside each sleeping area, and on every story, with interconnection and hard-wiring for new construction. Larimer County adopted the 2024 building codes. There is no distinct county smoke-detector rule beyond these adopted standards; incorporated cities such as Fort Collins and Loveland enforce the same model codes with their own local amendments.
Smoke-alarm requirements are enforced at permit and inspection; missing or noncompliant alarms can fail inspection and delay a certificate of occupancy.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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Fort Collins, CO
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Side-by-side rule comparisons with other cities in Larimer County.
See how Fort Collins's smoke detectors rules stack up against other locations.
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