New construction · Mill Valley
How does the wildfire (WUI) zone affect new construction in Mill Valley?
Mill Valley parcels in a Fire Hazard Severity Zone must meet California Building Code Chapter 7A — ignition-resistant exteriors, ember-resistant vents, Class A roofing, and defensible space. Most Mill Valley parcels are in CAL FIRE Very-High Fire Hazard Severity Zone — Chapter 7A and Marin-specific defensible-space rules apply.
What changes the answer in Mill Valley.
Most Mill Valley parcels are in CAL FIRE Very-High Fire Hazard Severity Zone — Chapter 7A and Marin-specific defensible-space rules apply. Site access in Mill Valley can require temporary street-use or encroachment permits depending on street width, on-street parking restrictions, and proximity to schools or transit corridors.
- Most Mill Valley parcels are in CAL FIRE Very-High Fire Hazard Severity Zone — Chapter 7A and Marin-specific defensible-space rules apply.
- Chapter 7A material requirements
- Defensible-space inspection prior to final
- Site access in Mill Valley can require temporary street-use or encroachment permits depending on street width, on-street parking restrictions, and proximity to schools or transit corridors.
Source-backed note
Cal Fire and City of Mill Valley Planning & Building Department jointly verify Chapter 7A compliance; the parcel's official FHSZ designation is the controlling input.
Reference: Cal Fire — Fire Hazard Severity Zones — Cal Fire / OSFM
Local authority: City of Mill Valley Planning & Building Department
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