Tree Trimming: Altadena vs Pasadena
How do tree trimming rules compare between Altadena, CA and Pasadena, CA?
Altadena and Pasadena have similar restriction levels.
Altadena, CA
Los Angeles County
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 public right-of-way are maintained by LA County Public Works.
View full Altadena rules →Pasadena, CA
Los Angeles County
Pasadena has a strong urban forestry program. Property owners must maintain trees to provide clearance over sidewalks (8 feet) and streets (14 feet). City-owned street trees are maintained by the Public Works Department.
View full Pasadena rules →Key Facts Comparison
| Fact | Altadena | Pasadena |
|---|---|---|
| Oak Permit Required | Yes if entering protected zone | - |
| Code Section | LA County 22.174.040 | - |
| Parkway Trees | Maintained by LA County DPW | - |
| Utility Pruning | Allowed with notice (PUC 911) | - |
| Sidewalk Clearance | - | 8 feet minimum |
| Street Clearance | - | 14 feet minimum |
| City Trees | - | Maintained by Public Works |
| Authorization | - | Required for city tree work |
Highlighted rows indicate differences between cities.
Altadena FAQ
Can I trim the oak in my Altadena backyard?
Light pruning of dead wood is generally fine, but anything entering the protected zone or removing >25% of crown needs an Oak Tree Permit under LA County Code 22.174.040.
Pasadena FAQ
Can I trim a tree near my sidewalk?
You must maintain 8 feet of clearance over sidewalks on your private trees. City-owned street trees are maintained by Public Works.
Who trims street trees in Pasadena?
The Public Works Urban Forestry Division maintains city-owned street trees. Contact them for service requests.
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