Most of unincorporated Marin County is designated Wildland-Urban Interface under the Marin County Fire Code (Title 16). WUI properties must meet Chapter 7A construction standards for ignition-resistant materials and maintain 100 feet of defensible space year-round.
Marin County Code Title 16 (re-enacted as Ordinance 3775 in December 2024) adopts the California Fire Code and Wildland-Urban Interface Code. Nearly all unincorporated Marin is mapped within designated WUI / Fire Hazard Severity Zones (Moderate, High, or Very High). New construction and substantial remodels in WUI zones must comply with California Building Code Chapter 7A: ignition-resistant exterior walls, Class A roof assemblies, ember-resistant vents, dual-pane tempered windows, and enclosed eaves. Marin County Fire Department inspects compliance at building permit review.
Building in a WUI zone without Chapter 7A compliance prevents permit final and certificate of occupancy. Existing properties failing inspection face annual defensible-space citations with fines up to $500 per offense plus abatement liens.
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Marin County, CA
Driveway approaches onto county roads in unincorporated Marin County require an encroachment permit from County Public Works and must meet sight-distance, dr...
Marin County, CA
On County roads designated by Board of Supervisors resolution and posted with signs, oversized commercial vehicles (commercial-plated vehicles or combination...
Marin County, CA
Marin County has no county-wide overnight parking ban; on County roads designated by Board of Supervisors resolution and posted with signs, no vehicle may pa...
Marin County, CA
In unincorporated Marin County, it is unlawful to park a vehicle on any street or highway for more than 72 consecutive hours; signed roads carry additional p...
Marin County, CA
Marin County has no general ordinance banning recreational vehicles, trailers, or boats from parking on streets in unincorporated areas; the 72-hour street-p...
Marin County, CA
Shared boundary fences in California are governed by the Good Neighbor Fence Act (CA Civil Code §841), presuming adjoining owners share the cost equally afte...
See how Marin County's wildfire zones rules stack up against other locations.
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