7 rules for unincorporated Glenn County, California.
Verified from official government sources
In unincorporated Glenn County, fence height is regulated by the Title 15 Unified Development Code. The main numeric limit found in the code applies in traffic vision-clearance areas, where a fence or wall may exceed 3 feet only up to 4 feet, and the extra foot must not be solid. General side/rear residential fences follow zone standards and state building code permit thresholds.
Glenn County does not publish a separate county fence-permit ordinance for ordinary fences. Whether a building permit is needed follows the California Building Code adopted by the county: fences not over 7 feet high are exempt from a building permit. Zoning compliance with Title 15 (height, sight-distance, setbacks) is still required regardless of whether a building permit applies.
Glenn County's Title 15 code does not set out a boundary-fence cost-sharing rule; that is governed by California Civil Code Section 841, the state "good neighbor fence" law. Adjoining owners are presumed to share equally in the reasonable cost of building and maintaining a shared boundary fence, and a 30-day written notice is required before incurring those costs.
Glenn County does not publish a standalone retaining-wall height ordinance for unincorporated areas. Permit requirements follow the California Building Code the county adopts: a retaining wall not over 4 feet (measured from the bottom of the footing to the top) is exempt from a building permit unless it supports a surcharge. Taller walls or walls supporting a load require a permit and engineering.
Glenn County's Title 15 Unified Development Code sets fence rules mainly through height measurement, vision-clearance limits near intersections, and zone-specific screening requirements. In certain industrial settings abutting residential zones, a solid wall, solid fence, or landscaping buffer is required. Most rural and residential boundary fences must keep sight lines clear and meet the building code permit threshold.
Glenn County's Title 15 code does not publish a general list of banned fence materials. The one material-related limit found in the code applies in vision-clearance areas: where a fence exceeds 3 feet up to 4 feet, the additional foot must not be solid so visibility is maintained. Otherwise, ordinary fence materials are allowed subject to building code and zone standards.
Common fence materials are allowed in unincorporated Glenn County. Title 15 does not list prohibited materials generally; its only material-specific rule keeps the upper portion of a fence non-solid within traffic vision-clearance areas. Material choice is otherwise governed by zone standards and the California Building Code permit threshold for fences over 7 feet.
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