Fence Regulations in Larimer County, CO (2026)
4 county-level rules, plus city-specific rules for 2 cities in Larimer County, Colorado.
Verified from official government sources
Height Limits
For permitted fences built without custom engineering, Larimer County sets prescriptive construction standards: 6x6 support posts at a maximum 6 feet on center and at least 3 feet deep, 2x6 horizontal rails at a maximum 24 inches on center, and a maximum 9-foot height.
Fence Construction Standards in Larimer County
Some RestrictionsLarimer County Residential Fence Permits handout (updated Feb 2026)
Without engineering, the following prescriptive rules apply: 6x6 support posts at 6 feet maximum on center, minimum 3 feet deep (use preservative-treated or decay-resistant wood); 2x6 horizontal support rails at 24 inches maximum on center; Maximum 9-foot fence height.
Fence Permit Requirements
A residential building permit is required for a fence that is over 7 feet high and has a solid, wind-blocking surface. You submit a permit application, a site plan, and an elevation view; the county inspects footings and the finished fence.
When a Fence Permit Is Required in Larimer County
Some RestrictionsLarimer County Residential Fence Permits handout (updated Feb 2026)
What inspections are required? Setback/footings – after holes are dug and prior to pouring concrete. Framing/final – after the fence is constructed and all framing is visible.
Retaining Walls
In unincorporated Larimer County, a retaining wall over four feet high is treated as a special structural item that requires engineered detail sections as part of a building permit submittal. Walls in a floodplain or right-of-way get added Engineering review.
Retaining Wall Permits in Larimer County
Some RestrictionsLarimer County Building Division, Detached Structures submittal checklist
Detail Sections of critical construction or special structural items like decks, porches, retaining walls over four feet, etc.
Material Restrictions
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.
Fence Material Restrictions and Wildfire Rules
Some RestrictionsLarimer County Residential Fence Permits handout (updated Feb 2026)
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 away from the structure shall be constructed with noncombustible or ignition-resistant materials.
Fence Regulations by City in Larimer County
2 cities in Larimer County have their own fence regulations rules. Each link goes to that city's dedicated page with code citations.
All Larimer County ordinances
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