7 rules for unincorporated Mariposa County, California.
Verified from official government sources
Mariposa County is entirely unincorporated. A building permit is not required for fences 7 feet or less in height; taller fences need a permit. In rural areas the Planning Department has no jurisdiction over fence placement, so height is largely a civil matter. Stricter limits apply inside adopted Town Planning Areas such as Mariposa.
In unincorporated Mariposa County a building permit is required only for fences taller than 7 feet, following the California Residential Building Code. Retaining walls over 4 feet high also require a permit. In rural areas the Planning Department does not regulate fence placement, but Town Planning Area parcels may need Design Review.
Mariposa County has no incorporated cities, and in rural areas the Planning Department does not regulate fence placement, treating boundary fences as a civil matter between neighbors. California Civil Code Section 841 (the Good Neighbor Fence Law) governs shared boundary fences, presuming adjoining owners share equally in construction and maintenance costs.
In unincorporated Mariposa County, a building permit is required for retaining walls over 4 feet high (measured from the bottom of the footing to the top of the wall), or for any wall retaining a surcharge, under the California Residential Building Code as applied by the County. Lower freestanding retaining walls are generally exempt.
Unincorporated Mariposa County imposes few general fence requirements: fences 7 feet or less are exempt from a building permit, and in rural areas the Planning Department does not regulate placement. Inside the Mariposa Town Planning Area, fences are limited to 3 feet in front-yard setbacks and 6 feet in side and rear setbacks.
Unincorporated Mariposa County has no general countywide fence-material ban; in rural areas the Planning Department does not regulate fence placement or materials. Inside adopted Town Planning Areas, fences may be subject to Design Review for height, structure, and design materials, particularly within historic design-review overlay zones.
There is no general countywide list of approved or prohibited fence materials in unincorporated Mariposa County, and rural fence materials are not regulated by the Planning Department. Common wood, wire, and chain-link fences are widely used. Town Planning Area and design-review overlay parcels may have their fence materials reviewed through Design Review.
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