Heritage & Protected Trees: Downey vs Los Angeles
How do heritage & protected trees rules compare between Downey, CA and Los Angeles, CA?
Downey has fewer restrictions than Los Angeles.
Downey, CA
Los Angeles County
Downey's Urban Forest Management Plan and Street Tree Master Plan guide tree preservation. Street trees of significant size or species may receive additional protection. The Director designates tree varieties for parkways.
View full Downey rules →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 →Key Facts Comparison
| Fact | Downey | Los Angeles |
|---|---|---|
| UFMP | Urban Forest Management Plan | - |
| STMP | Street Tree Master Plan | - |
| Designation | Director selects species | - |
| Protection | Damage to street trees prohibited | - |
| 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 |
Highlighted rows indicate differences between cities.
Downey FAQ
How is a heritage tree designated?
Based on trunk size (typically 24+ inches), species rarity, age, or historical significance. Residents may nominate trees.
Can I ever remove a heritage tree?
Only with special approval, typically from city council or tree commission. Granted mainly for safety hazards.
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.
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