Antioch, CA Building Setbacks & Zoning: Setback Rules (2026)

Corner lots in Antioch are subject to special setback and visibility standards under Antioch Municipal Code Title 9 Chapter 9-5 and traffic-safety provisions in AMC Chapter 4. Because a corner lot abuts two streets, both street frontages are treated as front yards for the purpose of allowed uses (no front-yard storage, screening, etc.), though the setback depth from the secondary (flanking) street is usually reduced to 10-15 feet versus the 20-foot primary front setback. The homeowner designates which street is the primary frontage based on the address orientation and building placement. A critical corner-lot rule is the vision clearance triangle (sometimes called a sight triangle or clear vision triangle). Under AMC 4 and engineering standards, no fence, wall, sign, hedge, tree trunk, or landscaping over 3 feet in height (measured from the top of curb) may be placed within a triangle typically formed by 25 feet from the back of curb along each street and a line connecting those two points. Mature tree canopies pruned up to 7 or 8 feet are allowed within the triangle. This rule ensures drivers approaching the intersection have line of sight. Violations are enforceable through code enforcement with correction notices. Fences along the interior side and rear property lines follow normal height standards (up to 6 feet). On the flanking street, fences in the required setback area are typically limited to 3.5-4 feet. Additional considerations: driveways on corner lots must be set back from the intersection per city engineering standards to avoid conflicts with cross-traffic.