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🌿 Landscaping Rules/Tree Removal & Heritage Trees

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

Heavy Restrictions

Oak trees (genus Quercus) with a trunk circumference of 25 inches or more (8-inch diameter at 4.5 ft above grade) are protected β€” removal, damage, or encroachment into the protected zone requires an Oak Tree Permit under LA County Code Chapter 22.174.

View full Altadena rules β†’

Downey, CA

Los Angeles County

Some Restrictions

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 β†’

Key Facts Comparison

FactAltadenaDowney
Code SectionLA County Code Ch. 22.174-
Protected Sizeβ‰₯8 in DBH / 25 in circumference-
Protected Zone5 ft outside dripline-
Replacement2:1 typical-
Heritage Oakβ‰₯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 β€” 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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