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Board adopts State Fire Marshal-recommended fire-hazard severity zones; WUI requirements will apply in designated areas
Summary
The Board of Supervisors adopted an ordinance on June 3 to confirm the 2025 fire-hazard severity zone map recommended by the Office of the State Fire Marshal, placing WUI building-code requirements into effect in the designated local-responsibility areas.
The San Joaquin County Board of Supervisors adopted an ordinance on June 3 to designate 2025 fire-hazard severity zones consistent with the Office of the State Fire Marshal's recommendations. Assistant Director Merlo of the Community Development Department presented the map, explained the difference between local responsibility areas and state responsibility areas, and described the effect of local designation on building permits and wildland-urban-interface (WUI) code requirements.
Why it matters: designation of fire-hazard severity zones places WUI construction and defensible-space requirements on new development and remodels inside the mapped areas; that can affect building materials, permitting costs and, potentially, insurance…
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