7 rules for unincorporated Lassen County, California.
Verified from official government sources
In unincorporated Lassen County, the Title 18 zoning ordinance limits fences, shrubs, and hedges in residential districts to three feet in a required front yard and six feet in side and rear yards, with up to eight feet allowed between side or rear yards if the part above six feet is designed for air circulation.
Lassen County follows the California Building Standards Code. Under California Residential Code Section R105.2, fences not over seven feet high are exempt from a building permit, and retaining walls not over four feet (measured from the bottom of the footing) are exempt unless they support a surcharge. Zoning height limits in Title 18 still apply.
Cost-sharing for boundary fences in unincorporated Lassen County is governed by California's Good Neighbor Fence Act (Civil Code 841), which presumes adjoining owners share equally in construction and maintenance and requires 30 days' written notice before work. Lassen County's Title 18 sight-distance rule also limits corner-lot fences to three feet for visibility.
In unincorporated Lassen County, retaining walls follow the California Building Standards Code. Under California Residential Code R105.2, a retaining wall not over four feet tall, measured from the bottom of the footing to the top, is exempt from a building permit unless it supports a surcharge. Taller or loaded walls need a permit.
Most general fence requirements in unincorporated Lassen County come from the Title 18 zoning General Provisions: front-yard fences and hedges limited to three feet, side/rear to six feet (up to eight between side/rear yards), and corner sight-distance limited to three feet. Agricultural rezoning to non-agricultural use also triggers a specific perimeter-fencing standard.
Lassen County's Title 18 zoning does not impose a general list of prohibited fence materials for unincorporated areas. The main material-related rule is functional: fence portions above six feet between side or rear yards must be designed to permit adequate air circulation. Agricultural perimeter fencing has a specific wire-and-post standard.
Lassen County's Title 18 zoning sets few material rules for unincorporated fences: above six feet between side or rear yards a fence must permit adequate air circulation, and agricultural-conversion perimeter fencing must meet a four-wire, 48-inch-top-wire standard. No county-wide ban on common fence materials was identified, but building-code and sight-distance rules still apply.
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