Larimer County requires noncombustible or ignition-resistant fence materials near structures in wildfire-regulated areas: fencing within 8 feet of a Wildfire Resiliency Code structure, or up to the property line if it is closer than 8 feet, must be noncombustible or ignition-resistant.
Because much of unincorporated Larimer County is wildland-urban interface (High Park and Cameron Peak fire country), fence material is a wildfire-safety issue near buildings. The rule: fencing within 8 feet of a structure regulated by the Wildfire Resiliency Code, or up to the property line when the property line is less than 8 feet from the structure, must be constructed with noncombustible or ignition-resistant materials. Separately, a solid, wind-impenetrable surface (wood, masonry, vinyl, chain link with solid slats) over 7 feet is what triggers a building permit. Combustible wood fences are still allowed away from the immediate structure zone, subject to height and permit rules.
A combustible fence in the required noncombustible zone can be flagged during permit review or wildfire-code inspection and required to be replaced with compliant materials.
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