Heritage & Protected Trees: Altadena vs Carson
How do heritage & protected trees rules compare between Altadena, CA and Carson, CA?
Carson has fewer restrictions than Altadena.
Altadena, CA
Los Angeles County
Oak trees ≥36 inches in diameter qualify as Heritage Oaks under LA County Code Chapter 22.174 and receive heightened review. Removal is rarely approved.
View full Altadena rules →Carson, CA
Los Angeles County
Carson does not maintain a separately enumerated 'heritage tree' or 'landmark tree' registry in its Municipal Code. Instead, all parkway and right-of-way trees are uniformly protected under CMC Article 3 Chapter 9, and unauthorized removal is valued at the tree's full appraised worth under the Council of Tree and Landscape Appraisers Guide for Plant Appraisal (10th Ed.).
View full Carson rules →Key Facts Comparison
| Fact | Altadena | Carson |
|---|---|---|
| Heritage Threshold | ≥36 in DBH | - |
| Code Section | LA County Code Ch. 22.174 | - |
| Replacement Ratio | Up to 4:1 | - |
| Heritage registry? | - | No separate heritage-tree designation in Carson code |
| Protection mechanism | - | Flat protection under CMC Article 3 Ch. 9 + appraised-value penalty |
| Valuation method | - | CTLA Guide for Plant Appraisal, 10th Edition |
| Approved species list | - | Parkway Tree Master Plan / Authorized List of Carson Trees (Exhibit A) |
| State preemption | - | None — heritage-tree law is local in CA |
Highlighted rows indicate differences between cities.
Altadena FAQ
What is a Heritage Oak in Altadena?
Any oak with a trunk 36 inches in diameter or larger under LA County Code Ch. 22.174 — these receive heightened protection.
Carson FAQ
Does Carson designate specific 'heritage' or 'specimen' trees?
No — Carson does not maintain a named heritage-tree list in its Municipal Code. All parkway and right-of-way trees are equally protected under Article 3 Chapter 9, and a large mature tree's value under the CTLA Guide for Plant Appraisal can far exceed $1,000, so the penalty scales with the tree.
Can a developer remove a mature tree during construction?
If the tree is in the parkway or city right-of-way, the developer must obtain Public Works approval under Chapter 9 and follow any replacement direction from the Public Works Division. For trees on private property, no city-wide private-tree permit applies, but check zoning landscape conditions of approval under CMC Article IX.
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