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

Corner lots in Walnut Creek residential zones are subject to special setback rules because they have two street-facing property lines. The primary front yard setback applies to the frontage containing the main entrance, while the secondary street frontage (often called the street-side or exterior side yard) is subject to a larger setback than an interior side yard, typically 10-15 feet. Vision clearance triangles are required at intersections and driveway/street corners, with no fence, wall, hedge, sign, or landscaping over 3 feet in height permitted within the triangle. The vision triangle typically extends 25-30 feet along each curbline from the intersection. Corner fence heights are restricted in the street-side setback, typically limited to 3-4 feet at the corner and in the vision triangle. ADUs on corner lots must still maintain the vision triangle and street-side setbacks, though they qualify for 4-foot setbacks on interior lines under state law. Driveway placement on corner lots is typically restricted from the corner itself to minimize intersection conflicts.