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

San Ramon Development Code treats corner lots with special rules to maintain street character, visibility, and traffic safety. In R-1 zones, the primary front yard (the address-facing side) typically requires a 20-foot setback for the main dwelling. The street-side yard (the other street-facing side) typically requires a 10- to 15-foot setback — shorter than a front yard but greater than a typical interior side yard. The opposite-of-front line is treated as the rear yard. Fences on corner lots face additional restrictions: typically 3.5-foot height maximum in the primary front-yard setback, and 3.5- to 4-foot max in the street-side-yard setback (or open-style fencing above that) to maintain neighborhood visibility and prevent blind corners. The sight-distance triangle at the intersection — generally a triangular area measured 15–25 feet back from the curb along both streets — must be kept free of visual obstructions over 3 feet tall, including landscaping. This rule derives from California Streets and Highways Code and AASHTO guidelines, and local ordinance enforces it. Driveways on corner lots are typically restricted from being placed too close to the intersection (often 20+ feet back). Accessory structures including ADUs must meet the street-side setback as if it were a front yard, not an interior side yard. HOAs in specific plan areas may impose stricter corner-lot design standards. Variances can be requested but must demonstrate hardship.