Ontario, CA Fence Regulations: Material Restrictions (2026)

The Ontario Development Code limits fence materials in residential zones to durable, finished materials including wood, vinyl, wrought iron, decorative metal, and stucco or masonry walls. Chain-link fencing is generally prohibited in front yards and exterior side yards along a street because of its utilitarian appearance, but is allowed in rear and interior side yards and on industrial and commercial parcels. Barbed wire, razor wire, concertina wire, and similar security materials are limited to industrial and agricultural zones, often above a minimum height and angled inward to reduce hazard. Electric fences are tightly restricted and typically require a specific approval. HOA design rules frequently impose stricter material standards, requiring uniform wood, vinyl, or masonry throughout a tract. Temporary construction fencing in chain link with windscreen is permitted on active job sites under a permit. All materials must be maintained in good repair; leaning, broken, or rotting fences can be cited as blight.