How to apply for a tree removal permit in Thousand Oaks, California

A 5-step walkthrough drawn from Thousand Oaks's tree-protection ordinance. For the underlying DBH thresholds, protected-species list, and full fee schedule, see the city ordinance page.

Expected processing time: 6-10 weeks. Plan removal timing accordingly — emergency-tree provisions may differ.

  1. 1

    Determine if your tree is regulated

    Trees at or above 2" DBH (diameter at breast height) are regulated. Oak Tree Preservation Ordinance protects all oak trees 2+ inches DBH (single trunk) or 4+ inches DBH aggregate (multi-trunk). Heritage Oaks (36+ inches DBH) receive enhanced protection. California Sycamore and other native trees also protected. Heritage / landmark designation: Heritage Oaks: any oak tree 36+ inches DBH. Additional Heritage designation by Council for exceptional size, age, species rarity, historical association, or community value.

  2. 2

    Determine who must apply

    Eligible applicants in Thousand Oaks: Property owner or authorized agent with ISA Certified Arborist report.

  3. 3

    Prepare your assessment report

    Your assessment report must include: Tree inventory with species, DBH, canopy dripline, health/condition, impact analysis, tree protection measures during construction, replacement/mitigation plan. Required certifications: ISA Certified Arborist.

  4. 4

    Submit to the permitting department

    Submit your application and assessment report to Community Development Department. Typical processing time: 6-10 weeks. Reference the full ordinance at https://www.toaks.org/departments/community-development/planning/oak-tree-preservation.

    View the full Thousand Oaks ordinance

  5. 5

    Plan for replacement obligations

    Replacement ratio: 2:1 for oaks; 10:1 or inch-for-inch mitigation for Heritage Oaks. Replacement oaks grown from locally-collected acorns where feasible; 15-gallon minimum. In-lieu fees of approximately $500 per inch DBH to the Oak Tree Preservation Fund when on-site replanting is infeasible.

Where to file

Community Development Department

Other California permit walkthroughs

See California replacement obligations compared — how Thousand Oaks's replacement ratio ranks against the rest of the state.

See California heritage criteria compared — how Thousand Oaks's designation rules stack against the rest of the state.

Compare with nearby cities

Need an arborist report for your Thousand Oaks permit?

Capture an ISA TRAQ Level 1, 2, or 3 assessment in the field and export a municipality-ready PDF that fits Thousand Oaks's required report sections. Free, no account required.

Start a TRAQ assessment