General Tree Protections

Any tree measuring 6 ½ inches diameter measured 4 ½ from ground level, or any multi-stemmed tree with the sum of the circumferences measuring 40 inches or larger, measured 4 ½ from ground level, or any significant grouping of trees, (groves of four or more trees) that is located on any of the properties specified below:

1. Any developed property within any commercial, professional office or industrial district.

2. Any undeveloped property within any district or private property that can be subdivided.

3. Any area designated on the general plan for recreational purposes or open space.

4. Any area designated in the county general plan open space element as visually significant riparian or ridge line vegetation and where the tree is adjacent to or part of a riparian foothill woodland or oak savanna area. (Ords. 94-59, 94-22)

For permit application information contact the Community Development, 925-335-1381.

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Native and Indigenous Tree List 

Any tree part of a stand of four or more trees and is 6.5 inches in diameters measured 4 ½ from ground level and is included in the following list of indigenous trees is protected.

1. Arroyo Willow

2. Bigleaf Maple

3. Black Cottonwood

4. Blue Oak

5. Box Elder

6. California Bay or Laurel

7. California Black Oak

8. California Black Walnut

9. California Buckeye

10. California Juniper

11. California Sycamore

12. Canyon Live Oak

13. Coast Live Oak

14. Coast Red Elderberry

15. Coast Redwood

16. Digger Pine

17. Fremont Cottonwood

18. Interior Live Oak

19. Knobcone Pine

20. Madrone

21. Tanoak or Tanbark Oak

22. Toyon

23. Valley Oak

24. White Alder

25. Yellow Willow