Sunnyvale, CA Landscaping Rules: Tree Trimming (2026)
Key Facts
- Heritage size
- 38-inch circumference single trunk
- Code reference
- SMC Chapter 19.94
- Permit threshold
- Over 25 percent canopy
- Street trees
- City maintained, no resident trimming
- Max fine
- 10000 dollars plus replacement
Summary
Sunnyvale has a strong Heritage Tree Ordinance under Municipal Code Chapter 19.94 requiring permits to trim large trees. Routine pruning is allowed but heavy cuts on protected trees need city approval.
(2) Remove that portion of a tree that extends within 10 feet of the outlet of a chimney or stovepipe. (3) Maintain a tree, shrub, or other plant adjacent to or overhanging a building free of dead or dying wood. (4) Maintain the roof of a structure free of leaves, needles, or other vegetative materials. (5) Before constructing a new building or structure or rebuilding a building or structure damaged by a fire in an area subject to this section, the construction or rebuilding of which requires a building permit, the owner shall obtain a certification from the local building official that the dwelling or structure, as proposed to be built, complies with all applicable state and local laws.
Full Breakdown
Sunnyvale Municipal Code Chapter 19.94 protects trees meeting the city definition of heritage, including single-trunk trees 38 inches or greater in circumference measured 54 inches above grade and multi-trunk trees of specified sizes. Any pruning that removes more than 25 percent of the canopy of a protected tree requires a permit from the city arborist. Routine maintenance pruning such as deadwood removal, clearance from buildings, and shaping under the 25 percent threshold is allowed without a permit. Trees in the public right of way are maintained by Sunnyvale Urban Forestry and residents must not trim them without permission. Violations of heritage tree rules can result in fines up to 10000 dollars plus replacement costs.
Frequently Asked Questions
Can I prune my own backyard tree without a permit?
Who trims the street tree in front of my house?
Sources & Official References
Other rules in Sunnyvale
California rules heatmap·Compare Sunnyvale to another location·View the California landscaping rules overview
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Tree Trimming in Nearby Cities
How other cities in Santa Clara County handle tree trimming.