Mission Viejo, CA Fence Regulations: Material Restrictions (2026)

Section 7-9-64 of the County of Orange Zoning Code regulates fences, walls, retaining walls, sound-attenuation walls, and screens primarily by height and location rather than by an extensive list of banned materials. The one explicit material restriction in this section is that fences located within a required front setback shall not use chain-link fencing (Section 7-9-64(b)(3)). The Zoning Code text reviewed does not establish a county-wide prohibition on materials such as barbed wire, razor wire, or electrified fencing in Section 7-9-64; where such restrictions exist they typically arise from specific district regulations, planned-community or specific-plan standards, agricultural-use context, or separate provisions, so owners should confirm the rules for their specific zoning district with OC Development Services. For structural integrity, any fence or wall over six (6) feet in height requires a building permit, and walls over six feet must be engineered, which is where material and construction standards (masonry, concrete, footings) are reviewed. Because this is a published reference and we cite only what the fetched code states, we do not assert a specific barbed-wire or razor-wire ban; verify district-specific or use-specific rules directly with the County.