Heritage & Protected Trees: Altadena vs Pasadena
How do heritage & protected trees rules compare between Altadena, CA and Pasadena, CA?
Altadena and Pasadena 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 →Pasadena, CA
Los Angeles County
Pasadena's Tree Protection Ordinance (PMC 8.52) protects native, specimen, mature, landmark, and landmark-eligible trees on private property. Native trees include Coast live oak, Engelmann oak, Canyon oak, California sycamore, and California walnut with trunks 8+ inches diameter at 4.5 ft above grade.
View full Pasadena rules →Key Facts Comparison
| Fact | Altadena | Pasadena |
|---|---|---|
| Heritage Threshold | ≥36 in DBH | - |
| Code Section | LA County Code Ch. 22.174 | PMC Chapter 8.52 |
| Replacement Ratio | Up to 4:1 | - |
| Native Threshold | - | 8-inch trunk at 4.5 ft |
| Species | - | Oak, sycamore, walnut, others |
| Incentives | - | Development standard waivers possible |
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.
Pasadena 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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