Tree removal permit rules in Altadena, CA — sometimes called heritage tree, protected tree, or street tree ordinances — list which trees require a permit before you can cut them down.
Oak trees (genus Quercus) with a trunk circumference of 25 inches or more (8-inch diameter at 4.5 ft above grade) are protected — removal, damage, or encroachment into the protected zone requires an Oak Tree Permit under LA County Code Chapter 22.174.
LA County Code Chapter 22.174 (Oak Tree Permits) prohibits cutting, destroying, removing, relocating, damaging, or encroaching into the protected zone of any native oak measuring 25 inches or more in circumference (8 inches in diameter) measured 4.5 feet above mean natural grade. The protected zone extends from 5 ft inside the dripline to 5 ft outside. Permits are processed by LA County Planning's Oak Tree Program. Heritage oaks (≥36 inches diameter) face additional review. Replacement at 2:1 ratio is typical for approved removals.
Unpermitted oak removal is a misdemeanor with fines up to $1,000 per tree, plus replacement and restitution. The Altadena CSD also encourages preservation of mature trees.
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Side-by-side rule comparisons with other cities in Los Angeles County.
See how other cities in Los Angeles County handle tree removal & heritage trees.
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