7 rules for unincorporated Lake County, California.
Verified from official government sources
In unincorporated Lake County, residential fences may be up to 4 feet in a required front yard and up to 6 feet along side and rear property lines without a use permit. Taller fences need a minor use permit. Corner-lot front fences are limited for visibility.
A building permit is generally not required for most fences in unincorporated Lake County, but a zoning minor use permit is required for fences over 4 feet in a front yard or over 6 feet along side/rear yards. Masonry/concrete fence walls over 4 feet need a building permit.
Lake County's Zoning Ordinance does not set a cost-sharing rule for shared boundary fences. For fences on the property line between neighbors, California Civil Code Section 841 (the Good Neighbor Fence Law) controls: adjoining owners are presumed equally responsible for a dividing fence.
In unincorporated Lake County, a building permit is not required for a retaining wall 4 feet or less in height (footing to top) unless it supports a surcharge. Walls over 4 feet, or those supporting a surcharge, need an engineered building permit. Walls 3 feet or less are exempt from zoning setbacks.
Unincorporated Lake County requires fences to respect height limits (4 ft front, 6 ft side/rear), corner-lot visibility, and official road setback lines. Taller fences need a minor use permit, and the County reviews them for sight distance and public-safety impacts.
Lake County's Zoning Ordinance does not list approved fence materials for general residential fences, but it does require see-through materials (wire mesh, chain link, transparent) for the upper portion of corner-lot front fences and for agricultural fences over 4 feet, to preserve visibility.
Common fence materials - wood, vinyl, chain link, masonry - are allowed in unincorporated Lake County subject to height and setback rules. The Zoning Ordinance specifically requires see-through materials for corner-lot front fences over 3 feet and agricultural fences over 4 feet in a yard.
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