Heritage & Protected Trees: Altadena vs Santa Monica
How do heritage & protected trees rules compare between Altadena, CA and Santa Monica, CA?
Altadena and Santa Monica 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 →Santa Monica, CA
Los Angeles County
Santa Monica protects trees through the Landmark Tree Program. Trees with exceptional characteristics may be designated by the Landmarks Commission as Landmark Trees, including private trees. SMMC Ch. 7.40 governs all public tree protection.
View full Santa Monica rules →Key Facts Comparison
| Fact | Altadena | Santa Monica |
|---|---|---|
| Heritage Threshold | ≥36 in DBH | - |
| Code Section | LA County Code Ch. 22.174 | - |
| Replacement Ratio | Up to 4:1 | - |
| Program | - | Landmark Tree Program |
| Authority | - | Landmarks Commission |
| Private Trees | - | May be designated at discretion |
| Code | - | SMMC Ch. 7.40 |
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.
Santa Monica 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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