1 county-level rule, plus city-specific rules for 2 cities in Larimer County, Colorado.
Verified from official government sources
Larimer County calls ADUs 'Accessory Living Areas' (ALAs) and regulates them under Section 4.3.10 of the Land Use Code. As of June 30, 2025, applicants no longer must complete a separate planning approval before applying for a building permit, aligning with Colorado HB24-1152. One ALA is permitted per single-unit dwelling lot, with one additional off-street parking space, an exterior exit not through the garage, and structural plans stamped by a Colorado-licensed Professional Engineer (high wind/snow loads).
2 cities in Larimer County have their own accessory structures rules. Each link goes to that city's dedicated page with code citations.
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Larimer County Ordinance Hub →