Tree Trimming: Mountain View vs Palo Alto
How do tree trimming rules compare between Mountain View, CA and Palo Alto, CA?
Mountain View and Palo Alto have similar restriction levels.
Mountain View, CA
Santa Clara County
Mountain View regulates pruning of heritage and street trees. Work on protected trees requires a permit and must follow ISA pruning standards.
View full Mountain View rules →Palo Alto, CA
Santa Clara County
Palo Alto has one of the strictest tree ordinances in California. Heritage, protected, and street trees may not be pruned more than 25 percent without a permit from the Urban Forestry program under PAMC Chapter 8.04.
View full Palo Alto rules →Key Facts Comparison
| Fact | Mountain View | Palo Alto |
|---|---|---|
| Heritage pruning | Permit required | - |
| Standard | ANSI A300 and ISA | - |
| Topping | Prohibited | Prohibited |
| Minor clearance | Under 25 percent canopy | - |
| Permitting body | City Forestry | - |
| Street trees | - | Permit required for all pruning |
| Protected trees | - | Oaks 11.5 inches plus, heritage trees |
| Pruning threshold | - | More than 25 percent triggers permit |
| Arborist report | - | Often required |
Highlighted rows indicate differences between cities.
Mountain View FAQ
Do I need a permit to trim my backyard oak?
If the oak qualifies as a Heritage Tree by species and size, yes. Contact the City Arborist before pruning beyond light clearance.
Can I hire any tree company?
Use a C-61 D-49 licensed tree service with an ISA Certified Arborist on staff to ensure code-compliant work on protected trees.
Palo Alto FAQ
Can I trim my own coast live oak?
Light clearance pruning under 25 percent of the canopy is usually allowed. Larger work requires a permit and an ISA arborist.
Who maintains the tree in front of my house?
If it is in the city right-of-way it is a street tree and maintained by the city. Homeowners cannot prune it without a permit.
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