Marin County, California

Last verified 2026-06-11 · Methodology · Changelog

Local wildfire code status: Adopted with local amendments

Marin County adopted the 2025 California Wildland-Urban Interface Code with local amendments through Ordinance No. 3838 (approved December 9, 2025), including a stricter limit on fire-retardant-treated wood as exterior wall material in WUI and Fire Hazard Severity Zones (Marin County Code 19.04.064). Supervisors moved in early 2026 to realign the siding restriction with the state code. Defensible space must be maintained at all times on WUI parcels, with growing emphasis on the 0 to 5 foot Zone 0 perimeter.

Sources: [1] · [2]

Hazard designation

CAL FIRE's 2025 Fire Hazard Severity Zone maps designate moderate, high, and very high zones across Marin's Local Responsibility Areas; local agencies must adopt the designations by ordinance under Government Code 51179(a). Marin fire agencies administer WUI parcel requirements through district-level programs.

Active mitigation programs

Insurance market conditions

Marin's median homeowners premium was the North Bay's highest at 2,658 dollars in 2024, up about 27 percent over ten years. Carrier pullbacks have moved more Marin homes to the FAIR Plan, whose statewide exposure reached 650 billion dollars in June 2025.

Sources: [1]

Market data is presented as sourced conditions, not advice about any carrier or policy decision. Verify current conditions with the state insurance department or a licensed professional.