Unincorporated Larimer County allows residential fences up to 6 feet without a building permit. Fences over 7 feet with a solid wind-impermeable surface require a building permit, fences in road setbacks cap at 8 feet, and the maximum residential fence height is 9 feet under the Land Use Code.
Larimer County fence rules are administered by the Community Development Department under the Land Use Code (authority CRS §30-28-111) and Building Code amendments to the 2021 IRC. A building permit is required when a fence exceeds 7 feet in height AND has a solid wind-impermeable surface (wood, masonry, vinyl, or chain-link with privacy slats); fences below that threshold are permit-exempt regardless of material. Section 4.9.2 of the Land Use Code restricts fences in required street and road setbacks to a maximum of 8 feet. The absolute maximum residential fence height is 9 feet. Permit submittals require the residential building permit application, three site plan copies showing fence location and total length, and two elevation views detailing fence height, post size, post depth, concrete amount, on-center spacing, and rail dimensions. The Larimer County Engineering Department reviews any fence located in a regulated floodplain or one that may impact traffic sight clearances on a public road. Agricultural fencing for livestock retains broad exemptions. HOA covenants in subdivisions around Berthoud, Wellington, and Red Feather Lakes commonly impose stricter material and height standards. Larimer County does not enforce city-style 4-foot front yard caps in unincorporated areas; setback rules apply to structures rather than to fences specifically.
Contact your local code enforcement office for specific penalty information.
See how Larimer County's height limits rules stack up against other locations.
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