The County zoning code doesn't decide who pays for a boundary fence. California's Good Neighbor Fence Law (Civil Code § 841) presumes adjoining owners share the cost equally, with 30 days' written notice before building.
Bostonia sits in unincorporated San Diego County, but disputes over a shared boundary fence are governed by California state law, not the County Zoning Ordinance. Civil Code § 841 presumes adjoining landowners benefit equally from a dividing fence and are equally responsible for reasonable construction, maintenance, and replacement costs unless they agree otherwise in writing. A landowner who intends to incur those costs must give each affected neighbor 30 days' prior written notice. The equal-share presumption can be overcome by showing it would be unjust given disproportionate burden, property-value impact, or financial hardship.
This is a civil matter, not a code violation. A neighbor who refuses a fair share may be sued in small-claims or civil court for their portion of reasonable costs.
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Bostonia, CA
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