Santa Clara County regulates tree trimming through Heritage Tree and Hillside ordinances. Light maintenance pruning is allowed, but heritage trees like native oaks require permits for substantial canopy work.
Santa Clara County Code protects certain trees as Heritage Trees based on species, size, or historical significance. Common heritage species include native oaks (coast live, valley, and blue oak), California bay, big leaf maple, California buckeye, and redwoods meeting minimum size thresholds (often 12 inches diameter at breast height for oaks, larger for other species). Trimming that removes more than approximately 25 percent of a heritage tree canopy, removes a major scaffold limb, or affects the tree long-term health requires a tree trimming or removal permit through Planning and Development. Routine maintenance pruning, deadwood removal, and hazard mitigation typically do not require permits. Owners must still comply with Public Resources Code 4291 defensible space in VHFHSZ by limbing up trees 6 feet from ground and maintaining clearance from structures, chimneys, and power lines. Utility companies (PG&E) are authorized to trim trees away from distribution lines under state easements. Trees within public rights-of-way require Department of Roads and Airports authorization.
Contact your local code enforcement office for specific penalty information.
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Side-by-side rule comparisons with other cities in Santa Clara County.
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