Rancho Cucamonga, CA Fence Regulations: Fence Permit Requirements (2026)

Section 17.48.020 opens with the general rule: "Unless otherwise exempt below, site development review [see section 17.16.100 (Site Development Review)] is required for new fences and walls." It then lists three categories of exempt fences and walls, which are excused from planning entitlements but may still need a building permit. First, retaining walls under 36 inches in height are exempt, except for terraced walls, which are separately regulated under Section 17.122.030 for hillside development. Second, residential fences and walls are exempt as long as they comply with the location and height standards of Section 17.48.030.

Third, any fence or wall required by city, county, state, or federal law or regulation, including temporary construction site fencing, is exempt from the chapter's requirements entirely. Because most single-family residential fences fall into the second exemption once they meet the height table in Section 17.48.030, most homeowners never file a discretionary application; they instead go straight to the building division if a permit is needed for the wall's construction. Fences and walls that don't fit the height/location standards, such as a fence that exceeds the height table or a masonry screen wall for a commercial or industrial use, must go through site development review under Section 17.16.100 before construction.

The chapter's stated purpose, per Section 17.48.010, is to regulate fence height and location for light, air, and privacy without blocking views or connectivity, to buffer differing land uses, and to protect visibility at street and driveway intersections.