Grading & Drainage: Altadena vs Pasadena
How do grading & drainage rules compare between Altadena, CA and Pasadena, CA?
Altadena and Pasadena have similar restriction levels.
Altadena, CA
Los Angeles County
Hillside grading exceeding 2,500 cubic yards cut + fill requires a Conditional Use Permit in Altadena (CSD 22.306.060.B.2.b). Grading during the Oct 15 – Apr 15 rainy season is subject to Public Works erosion-control requirements.
View full Altadena rules →Pasadena, CA
Los Angeles County
Grading in Pasadena is regulated under Title 14 Chapter 14.05 (Excavation, Grading, and Hillside Areas). Grading permits required for earthwork. Hillside areas have enhanced standards to minimize terrain alteration. Drainage plans must be submitted with development applications.
View full Pasadena rules →Key Facts Comparison
| Fact | Altadena | Pasadena |
|---|---|---|
| Code Section | Altadena CSD 22.306.060.B + LA County 22.140.240 | PMC Title 14, Ch. 14.05 |
| CUP Threshold | 2,500 cy cut + fill | - |
| Haul Route | Required ≥1,000 cy off-site | - |
| Rainy Season | Oct 15 – Apr 15 (extra controls) | - |
| Grading Permit | - | Required for earthwork |
| Hillside | - | Enhanced standards apply |
| Drainage Plan | - | Required for development |
Highlighted rows indicate differences between cities.
Altadena FAQ
Do I need a permit to grade my Altadena hillside lot?
Yes — a Minor Conditional Use Permit is required for any hillside development, and a full CUP if grading exceeds 2,500 cubic yards total (CSD 22.306.060.B).
Pasadena FAQ
Do I need a grading permit?
Generally required for earth-moving over 50 to 100 cubic yards or changes to existing drainage patterns. Small landscaping projects are usually exempt.
My neighbor changed their grading and water flows onto my property. What can I do?
Contact Pasadena code enforcement. Redirecting drainage onto neighboring properties violates most municipal codes. The neighbor may be required to restore proper drainage.
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