Tree Trimming: Pomona vs Topanga
How do tree trimming rules compare between Pomona, CA and Topanga, CA?
Pomona and Topanga have similar restriction levels.
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 →Topanga, CA
Los Angeles County
Tree trimming in unincorporated LA County is generally unrestricted for private property, except for protected oak trees. Any cutting or pruning of oak trees 8+ inches diameter requires an Oak Tree Permit under Chapter 22.174. Street trees are managed by county public works.
View full Topanga rules →Key Facts Comparison
| Fact | Pomona | Topanga |
|---|---|---|
| Historic Districts | Certificate of Appropriateness required | - |
| Street Trees | City-managed per Street Tree Policy | County public works manages |
| Standards | ISA pruning standards | - |
| Code | Ch. 46, Art. X / Ch. 18, Art. V | - |
| Private Trees | - | Generally no permit needed |
| Oak Trees | - | Permit required for 8+ inch diameter |
| Reference | - | Chapter 22.174 (Oaks) |
Highlighted rows indicate differences between cities.
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.
Topanga FAQ
Do I need a permit to trim trees on my property in LA County?
No permit is needed for general trimming of most species. However, oak trees are protected under the Oak Tree Ordinance (Chapter 22.174) and trimming that could harm the tree's health may require a permit. Contact the Department of Regional Planning at (213) 974-6411.
Can I trim my neighbor's tree branches that hang over my property?
Yes. Under California law, you can trim branches that overhang your property line back to the property line. However, you cannot trim in a way that kills the tree or you may be liable for its replacement value.
Who trims trees near power lines?
Utility companies (Southern California Edison, LADWP) have the right and responsibility to trim trees near power lines. Contact your utility provider to request trimming. Do not attempt to trim near power lines yourself.
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