Tree Removal & Heritage Trees: Altadena vs Downey
How do tree removal & heritage trees rules compare between Altadena, CA and Downey, CA?
Downey has fewer restrictions than Altadena.
Altadena, CA
Los Angeles County
Oak trees (genus Quercus) with a trunk circumference of 25 inches or more (8-inch diameter at 4.5 ft above grade) are protected — removal, damage, or encroachment into the protected zone requires an Oak Tree Permit under LA County Code Chapter 22.174.
View full Altadena rules →Downey, CA
Los Angeles County
Downey requires front setback areas to be landscaped with drought-tolerant plants. Street trees are managed by the city and may not be removed without authorization. Landscaping screening between dwellings must meet specific planting requirements.
View full Downey rules →Key Facts Comparison
| Fact | Altadena | Downey |
|---|---|---|
| Code Section | LA County Code Ch. 22.174 | - |
| Protected Size | ≥8 in DBH / 25 in circumference | - |
| Protected Zone | 5 ft outside dripline | - |
| Replacement | 2:1 typical | - |
| Heritage Oak | ≥36 in diameter | - |
| Front Setback | - | Must be landscaped (drought-tolerant) |
| Screening Plants | - | 1 per 5 linear ft (15-gal) or 1 per 10 ft (24-in box) |
| Street Trees | - | City-managed, no unauthorized removal |
| Code Enforcement | - | (562) 904-7153 |
Highlighted rows indicate differences between cities.
Altadena FAQ
Do I need a permit to remove an oak in Altadena?
Yes if the oak is 8 inches in diameter or larger at 4.5 feet above grade — LA County Code Ch. 22.174 (Oak Tree Permits) applies.
Downey FAQ
Can I remove a street tree in Downey?
No. Street trees in the public right-of-way are managed by the city. Contact Public Works for any issues with street trees.
What landscaping is required for new construction?
Front setback areas must be landscaped with drought-tolerant plants. Screening between dwellings requires specific planting densities as outlined in the development standards.
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