San Mateo, CA Landscaping Rules: Tree Trimming (2026)
Key Facts
- Private Trees
- No permit needed for trimming
- Street Trees
- Parks Division approval required
- Utility Lines
- Coordinate with PG&E
- Contact
- Public Works (650) 522-7300
Summary
Private tree trimming in San Mateo does not require a city permit. Street trees (public right-of-way) require permission from the Parks Division. Trees must not encroach on adjacent properties or utilities without proper trimming.
4291. (a) A person who owns, leases, controls, operates, or maintains a building or structure in the state responsibility area shall at all times do all of the following: (1) (A) Maintain defensible space of 100 feet from each side and from the front and rear of the structure, but not beyond the property line, except as provided in subparagraph (B). The amount of fuel modification necessary shall consider the flammability of the structure as affected by building material, building standards, location, and type of vegetation. Fuels shall be maintained and spaced in a condition so that a wildfire would be unlikely to ignite the structure.
Full Breakdown
San Mateo residents may trim private trees on their own property without a city permit. Street trees within the public right-of-way are city property and cannot be trimmed or removed without Parks Division approval. Trees near PG&E power lines must be managed according to utility clearance requirements. Trees overhanging neighboring properties or public sidewalks should be maintained to prevent hazards. Contact Public Works at (650) 522-7300.
Frequently Asked Questions
Can I trim tree branches that hang over my property in San Mateo?
Do I need a permit to trim trees in San Mateo?
Sources & Official References
Other rules in San Mateo
California rules heatmap·Compare San Mateo to another location·View the California landscaping rules overview
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Tree Trimming in Nearby Cities
How other cities in San Mateo County handle tree trimming.