City of Napa Municipal Code Section 17.52.170 regulates fences, walls, and hedges. Fences in residential side and rear yards are typically allowed up to 6 feet; fences over 6 feet require a building permit. Fences, walls, or dense hedges in the vision triangle at intersections and driveways cannot exceed 2 feet (or 3 feet if at least 50 percent open).
Section 17.52.170 of Napa's Zoning Code (Title 17, Ch. 17.52 Site and Use Regulations) controls fence height, vision, and design citywide. Residential side- and rear-yard fences are limited to 6 feet, with any fence over 6 feet in height requiring a separate building permit under the California Building Code as adopted in Title 15. Front-yard fences are restricted to lower heights to preserve streetscape and sight lines. The ordinance protects driveway and intersection visibility through the 'vision triangle': fences, walls, or dense planting may not exceed 2 feet, except fences that are at least 50 percent open (such as picket or wrought-iron) may rise to 3 feet. Height is measured from natural grade. Properties in the FP Floodplain Overlay or any historic district may face additional review by the Planning Division.
A solid fence over 6 feet without a building permit, or any fence over 2 feet in the vision triangle, is a Title 17 zoning violation. Code Enforcement can order shortening or removal and issue administrative citations under Chapter 1.24. Sight-distance violations near intersections also create civil liability if they contribute to a traffic collision.
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