San Mateo County’s Significant Tree Ordinance
Does size matter? Does age matter? Interference with Driplines? Tree Trimming? Is a permit needed?

Here’s a Quick Guide to let you know if your need a permit.

The New Ordinance
The Tree Ordinance was revised in the Fall of 2024; so, be sure you know the rules and regulations the county has posted on the County website before you make decisions about your trees.

Here, you can read the ordinance, particularly if you plan to trim trees, remove trees and replant trees after their removal, or if you are planning construction around protected trees.

You can also find information on:

• The Benefits of Trees
• Which Trees Are Protected
• Species Lists
• Tree Management Sources

Here’s a PDF of the new Ordinance to keep handy