Most of Altadena sits in CalFire-mapped Very High and High Fire Hazard Severity Zones — the January 2025 Eaton Fire destroyed thousands of structures here. Properties in these zones face heightened defensible-space, ember-resistant construction, and disclosure requirements.
The 2024 CalFire updated Fire Hazard Severity Zone maps significantly expanded VHFHSZ coverage in Altadena and the San Gabriel foothills. Properties in VHFHSZ must comply with Chapter 7A of the California Building Code (ignition-resistant exterior construction, ember-resistant vents, Class A roof) and the 200-foot defensible space rule. Sellers must provide an AB 38 Fire Hazard Disclosure for properties built before 2010. New STRs in these zones face additional posting requirements under LA County Code 7.96.060.O.
Failure to comply with defensible-space and ignition-resistant construction can prevent issuance of building permits, certificates of occupancy, and insurance renewal.
Altadena, CA
LA County allows backyard chickens in R-1 zones in unincorporated areas (including Altadena) subject to coop setbacks under LA County Code Title 10 and Title...
Altadena, CA
LA County Code Section 10.32.010 prohibits dogs running at large in any public place or private property other than the owner's, unless restrained by a chain...
Altadena, CA
Trimming protected oak trees (≥8 in DBH) requires an Oak Tree Permit if the work enters the protected zone or removes >25% of crown. Street trees in the publ...
Altadena, CA
In Altadena's Very High Fire Hazard Severity Zones, grass and weeds must be kept under 3 inches under LA County Fire Code Title 32 defensible-space rules.
Altadena, CA
LA County Fire's Brush Clearance program also functions as the weed-abatement ordinance — vacant and improved lots must keep weeds and grasses cut to under 3...
Altadena, CA
Outdoor watering in Altadena (served by Lincoln Avenue Water Co., Las Flores Water Co., Rubio Cañon, and Kinneloa Irrigation District) is limited to 2 days p...
Side-by-side rule comparisons with other cities in Los Angeles County.
See how other cities in Los Angeles County handle wildfire zones.
See how Altadena's wildfire zones rules stack up against other locations.
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