Grading & Drainage: Los Angeles vs Pomona
How do grading & drainage rules compare between Los Angeles, CA and Pomona, CA?
Los Angeles and Pomona have similar restriction levels.
Los Angeles, CA
Los Angeles County
Grading permits are required from LADBS for earthwork exceeding certain thresholds. The city conditions grading permits on stormwater pollution control compliance per LAMC 91.106.4.1. Hillside areas have enhanced grading standards under the Baseline Hillside Ordinance. Drainage must not direct water onto neighboring properties. A geotechnical report is typically required for hillside grading.
View full Los Angeles rules →Pomona, CA
Los Angeles County
Pomona requires grading permits for earthwork exceeding thresholds. Block wall and fencing plans must be consistent with the grading plan. Drainage must be directed away from neighboring properties.
View full Pomona rules →Key Facts Comparison
| Fact | Los Angeles | Pomona |
|---|---|---|
| Permit | LADBS grading permit required | Grading permit required |
| Stormwater | BMP compliance required (LAMC 91.106.4.1) | - |
| Hillside | Enhanced standards under BHO | - |
| Drainage | Must not direct water to neighbors | - |
| Geotech Report | Typically required for hillside | - |
| Plans | - | Must include drainage provisions |
| Fencing | - | Must be consistent with grading plan |
| Code | - | Pomona Development Code / Building Code |
Highlighted rows indicate differences between cities.
Los Angeles 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 Los Angeles code enforcement. Redirecting drainage onto neighboring properties violates most municipal codes. The neighbor may be required to restore proper drainage.
Pomona 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 Pomona code enforcement. Redirecting drainage onto neighboring properties violates most municipal codes. The neighbor may be required to restore proper drainage.
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