Properties in fire-prone areas of San Mateo must maintain defensible space under California PRC 4291. The San Mateo Consolidated Fire Department enforces vegetation management requirements. Hillside properties on the western slopes are subject to enhanced clearance requirements.
Brush clearance and vegetation management in San Mateo are enforced by the San Mateo Consolidated Fire Department. Properties in or adjacent to wildland-urban interface areas, particularly the western hillside neighborhoods, must maintain 100 feet of defensible space around structures per California Public Resources Code Section 4291. Zone 1 (0-30 feet) requires lean, clean, and green landscaping with no combustible materials. Zone 2 (30-100 feet) requires reduced and spaced vegetation. The fire department conducts seasonal inspections and issues notices for non-compliant properties. San Mateo's Mediterranean climate with dry summers creates elevated fire risk. Properties with heavy vegetation or ornamental plantings that create fire ladder conditions may be required to thin or remove plants.
Non-compliance with PRC 4291 carries fines up to $500 per day. The fire department may perform abatement and bill the property owner. Repeat violations result in escalating enforcement.
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See how San Mateo's brush clearance rules stack up against other locations.
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