Tree Trimming: Altadena vs Pomona
How do tree trimming rules compare between Altadena, CA and Pomona, CA?
Altadena and Pomona 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 →Pomona, CA
Los Angeles County
Pomona regulates tree trimming under its Tree Preservation Program and Street Tree Policy Manual. Trees in historic districts require a Certificate of Appropriateness before trimming. Street trees follow ISA pruning standards.
View full Pomona rules →Key Facts Comparison
| Fact | Altadena | Pomona |
|---|---|---|
| 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) | - |
| Historic Districts | - | Certificate of Appropriateness required |
| Street Trees | - | City-managed per Street Tree Policy |
| Standards | - | ISA pruning standards |
| Code | - | Ch. 46, Art. X / Ch. 18, Art. V |
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.
Pomona FAQ
Can I trim tree branches that hang over my property in Pomona?
Pomona regulates tree trimming under its Tree Preservation Program and Street Tree Policy Manual. Trees in historic districts require a Certificate of Appropriateness before trimming. Street trees follow ISA pruning standards.
Do I need a permit to trim trees in Pomona?
Historic Districts: Certificate of Appropriateness required. Street Trees: City-managed per Street Tree Policy. Standards: ISA pruning standards. Code: Ch. 46, Art. X / Ch. 18, Art. V.
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