Tree Replacement Requirements: Altadena vs South Gate
How do tree replacement requirements rules compare between Altadena, CA and South Gate, CA?
Altadena has fewer restrictions than South Gate.
Altadena, CA
Los Angeles County
The LA County Oak Tree Permit Ordinance encourages replanting and propagation of oak trees. When oak tree removal is approved, replacement planting conditions may be imposed. LA County Planning is updating the ordinance to further encourage planting new oak trees and redesigning projects to preserve existing trees.
View full Altadena rules →South Gate, CA
Los Angeles County
Under SGMC Chapter 5.33, when a public tree is removed (lawfully under permit or unlawfully), the Director of Public Works may require replacement with a tree of a size, species and condition determined by the Director. For unauthorized removals, the violator additionally owes the tree's full restitution value plus all labor and materials needed to install the replacement. South Gate does not codify a fixed 'X-for-1' replacement ratio in the Municipal Code; replacement is set case-by-case by the Director, generally aiming to match canopy lost and is informed by the Street Tree Master Plan's species palette.
View full South Gate rules →Key Facts Comparison
| Fact | Altadena | South Gate |
|---|---|---|
| Replacement | May be required as permit condition | - |
| Ordinance Update | In progress, more replanting focus | - |
| Propagation | Encouraged by county program | - |
| Oak Woodlands | Conservation management plan applies | - |
| Code Section | - | SGMC 5.33 — Director of Public Works discretion |
| Codified Replacement Ratio | - | None — set case-by-case by Director |
| Species Source | - | Street Tree Master Plan approved palette |
| Planting Standard | - | Western Chapter ISA |
| Restitution Formula | - | Full tree value + labor + materials |
| MWELO Threshold | - | Applies to landscapes >500 sq ft (new/rehab) |
Highlighted rows indicate differences between cities.
Altadena FAQ
How many replacement trees are required for oak removal?
Typically 2:1 to 10:1 ratio depending on the removed tree's size, health, and significance. Unauthorized removal is penalized at the highest replacement ratios. The Department of Regional Planning sets the exact ratio.
What species can I plant as replacements?
The same species as the removed tree or another approved native oak species (coast live oak, valley oak, interior live oak, canyon live oak). Replacement trees must be at least 15-gallon container size.
How long do I have to maintain replacement trees?
A minimum 5-year maintenance and monitoring period with annual reports to the Department of Regional Planning. Failed trees must be replanted. Irrigation must be provided during the establishment period.
South Gate FAQ
How many trees do I have to plant if one is removed?
South Gate does not codify a fixed ratio. The Director of Public Works sets the replacement requirement case-by-case under SGMC 5.33, considering the canopy lost, species, and site. Expect at minimum 1:1 like-for-kind replacement, with larger or signature trees often requiring upsized 24-inch box stock to approximate lost canopy.
Who chooses the replacement species?
The Director of Public Works selects from the Street Tree Master Plan's approved species palette to maintain block consistency, climate suitability, and infrastructure compatibility. You generally cannot substitute a different species without Public Works approval.
Do I have to water the replacement tree?
Yes — typical permit conditions require the applicant to maintain the replacement through an establishment period (commonly 2–3 years) and replace any failures. State MWELO rules (Title 23 CCR §490+) also require water-efficient drip irrigation for landscapes over 500 sq ft.
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