Heritage & Protected Trees: Los Angeles vs South San Gabriel
How do heritage & protected trees rules compare between Los Angeles, CA and South San Gabriel, CA?
South San Gabriel has fewer restrictions than Los Angeles.
Los Angeles, CA
Los Angeles County
Los Angeles protects four native species – Oak (Quercus), Western Sycamore, Southern California Black Walnut, and California Bay – with a trunk circumference of four feet or more (roughly 15 inches DBH). Removal, relocation, or damage requires a Board of Public Works permit, an arborist report, and 4:1 replacement.
View full Los Angeles rules →South San Gabriel, CA
Los Angeles County
LA County's Oak Tree Permit Ordinance (Chapter 22.174) protects oak trees in unincorporated areas. Heritage oak trees are recognized for their commemorative, horticultural, and historical significance. The ordinance aims to preserve and propagate the oak tree heritage. County forester reviews applications.
View full South San Gabriel rules →Key Facts Comparison
| Fact | Los Angeles | South San Gabriel |
|---|---|---|
| DBH threshold | 4-foot trunk circumference (~15 inch DBH) | - |
| Protected species | Native oak, sycamore, black walnut, bay | - |
| Permit | Board of Public Works approval required | - |
| Replacement | 4:1 ratio with 24-inch box stock | - |
| Arborist report | Certified arborist report mandatory | - |
| Heritage Oaks | - | Recognized for significance |
| Ordinance | - | Chapter 22.174 |
| Review | - | County forester inspection |
| Purpose | - | Preserve threatened oak heritage |
Highlighted rows indicate differences between cities.
Los Angeles FAQ
Can I cut a big oak on my own LA property?
No. If the oak is a native Quercus species with a trunk 4 feet around or larger, you need a Board of Public Works permit and arborist report before any removal or major pruning.
What counts as a heritage tree in LA?
LA uses "protected tree" rather than heritage. The four protected natives (oak, sycamore, walnut, bay) at 4-foot circumference qualify. Non-native species are not protected at the city level.
What if I damage roots during construction?
Encroachment into the 5-foot protected zone around the dripline – including grading, trenching, or hardscape – triggers permit review and may require monitoring by a certified arborist.
South San Gabriel FAQ
Are oak trees protected in LA County?
Yes. All native oaks with trunks 8+ inches in diameter (25+ inches circumference) are protected under the Oak Tree Permit Ordinance (Chapter 22.174). You need a permit before removing, relocating, or working near a protected oak.
What is the protected zone around an oak tree?
The drip line of the tree plus 5 feet in all directions. No grading, paving, trenching, or construction is allowed within this zone without an Oak Tree Permit. Root compaction from heavy equipment is also prohibited.
How do I get an Oak Tree Permit?
Apply through the LA County Department of Regional Planning at (213) 974-6411. An arborist report is typically required. The process includes review of alternatives to removal and may require replacement planting.
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