Heritage & Protected Trees: Altadena vs Glendale
How do heritage & protected trees rules compare between Altadena, CA and Glendale, CA?
Altadena and Glendale have similar restriction levels.
Altadena, CA
Los Angeles County
Oak trees ≥36 inches in diameter qualify as Heritage Oaks under LA County Code Chapter 22.174 and receive heightened review. Removal is rarely approved.
View full Altadena rules →Glendale, CA
Los Angeles County
Glendale's Indigenous Tree Ordinance (GMC 12.44) has protected native trees since 1982. Trees with trunks 6+ inches in diameter at 54 inches above grade are protected. Heritage, historic, landmark, and specimen trees cannot be cut, removed, or damaged without a permit.
View full Glendale rules →Key Facts Comparison
| Fact | Altadena | Glendale |
|---|---|---|
| Heritage Threshold | ≥36 in DBH | - |
| Code Section | LA County Code Ch. 22.174 | GMC 12.44 |
| Replacement Ratio | Up to 4:1 | - |
| Since | - | 1982 |
| Protection Threshold | - | 6-inch trunk diameter at 54 in. |
| Actions Prohibited | - | Cut, remove, damage without permit |
Highlighted rows indicate differences between cities.
Altadena FAQ
What is a Heritage Oak in Altadena?
Any oak with a trunk 36 inches in diameter or larger under LA County Code Ch. 22.174 — these receive heightened protection.
Glendale FAQ
How is a heritage tree designated?
Based on trunk size (typically 24+ inches), species rarity, age, or historical significance. Residents may nominate trees.
Can I ever remove a heritage tree?
Only with special approval, typically from city council or tree commission. Granted mainly for safety hazards.
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