Strict Protection Threshold: The City of Agoura Hills protects any oak tree having a trunk diameter of two inches or greater. This is an extremely low threshold, meaning almost any native oak on your property requires special attention.

Permit Required for Pruning/Trimming: The city explicitly states you may be required to apply for an Oak Tree Permit for:

Trimming the tree.

Any construction nearby (pools, patios, hardscaping) that involves encroachment into the protected zone (the dripline plus five more feet).

Mandatory Expert Consultation: The city’s process is structured to require professional consultation.

The city has retained the services of an “Oak Tree Specialist” to coordinate and supervise the processing of Oak Tree Permits and the alteration of any oak trees.

For major work (like a Development Permit) or when a significant percentage of the canopy or root structure is involved, an Oak Tree Report is required.

The Municipal Code suggests that approval for more extensive pruning (up to 20% of the canopy) is predicated upon the recommendation of the city’s oak tree preservation consultant (which is a Certified Arborist).

Penalties for Violation: Unauthorized removal or damage can lead to severe penalties, including a requirement to provide no less than four native oaks for any oak tree removed or relocated. This high-value replacement requirement underscores the financial and ecological risk of using an unqualified trimmer.

In summary: If you are in Agoura Hills and dealing with an oak tree of any significant size, hiring an ISA Certified Arborist is a practical necessity for correctly navigating the local permitting process and protecting yourself from significant penalties.

Read About Bob Loft, ISA Certified Arborist, here.