Thousand Oaks Tree Trimming Rules (2026): What You Need to Know
Heavy RestrictionsKey Facts
- Protected Species
- All Quercus (oak) species, 2+ inch trunk
- Protected Zone
- 5 ft beyond canopy or 15 ft from trunk
- Removal Permit
- Required (Protected Tree Permit)
- Pruning Permit
- Required for live tissue on protected trees
- Dead Wood Removal
- No permit needed
- Tree City USA
- Yes
The Short Version
Thousand Oaks — the "City of Trees" — strictly protects all oak species with trunks over 2 inches in diameter. A Protected Tree Permit is required for removal, and an Oak Tree Permit is needed to prune live tissue. The protected zone extends 5 feet beyond the canopy edge or 15 feet from the trunk. Unauthorized removal can result in severe penalties.
Full Breakdown
Under Thousand Oaks Municipal Code Article 42, all oak species (Quercus) with a trunk diameter over 2 inches are protected. The protected zone extends 5 feet beyond the outer edge of the canopy or 15 feet from the trunk, whichever is greater. A Protected Tree Permit is required for removal of any healthy protected tree. An Oak/Landmark Tree Permit is needed to prune live tissue or encroach into the protected zone. Dead wood removal does not require a permit. The city has a Tree Advisory Board that acts as an appeal body and champion for reforestation. Thousand Oaks is designated a Tree City, USA by the Arbor Day Foundation. Unauthorized removal can result in severe fines and criminal charges.
What Happens If You Violate This?
Unauthorized removal of protected trees can result in significant fines and criminal charges under both city ordinance and state law. The Community Development Department enforces tree protection.
Frequently Asked Questions
Can I cut down an oak tree on my property?
Do I need a permit to trim a tree?
Sources & Official References
How does Thousand Oaks compare?
See how Thousand Oaks's tree trimming rules stack up against other locations.