Grading & Drainage: Castro Valley vs Livermore
How do grading & drainage rules compare between Castro Valley, CA and Livermore, CA?
Castro Valley and Livermore have similar restriction levels.
Castro Valley, CA
Alameda County
Alameda County regulates grading under Title 15 and CBC Appendix J. Permits are required for cuts or fills over 50 cubic yards or 3 feet in depth; hillside overlays have stricter rules.
View full Castro Valley rules →Livermore, CA
Alameda County
Livermore requires grading permits for 50+ cubic yards of earthwork or 6+ ft of cut/fill under LMC Ch. 15.32 and CBC Appendix J.
View full Livermore rules →Key Facts Comparison
| Fact | Castro Valley | Livermore |
|---|---|---|
| Code authority | Title 15 and CBC Appendix J | - |
| Permit trigger | 50 cubic yards or 3 feet | - |
| Hillside zones | Geotech report required | - |
| Wet season | Enhanced BMPs Oct-Apr | - |
| Neighbor drainage | Cannot redirect without consent | - |
| Threshold | - | 50+ cubic yards |
| Cut/Fill | - | 6+ ft triggers permit |
| Drainage | - | 2% away from building |
| Code | - | LMC 15.32, CBC App J |
| Department | - | Engineering Division |
Highlighted rows indicate differences between cities.
Castro Valley FAQ
Do I need a permit to level my backyard?
Only if it exceeds 50 cubic yards, 3 feet in depth, or affects drainage onto neighbors. Small cosmetic grading for landscaping typically does not need a permit.
Can I divert runoff onto my neighbor's property?
No. Redirecting surface water that causes damage to adjoining property creates civil liability. Drainage must be directed to approved facilities or retained on-site.
Livermore FAQ
Do I need a permit to level my backyard?
Not if under 50 cubic yards and no slopes exceed 6 ft in height; larger work requires a grading permit.
Can I direct runoff onto my neighbor's yard?
No — you must handle drainage on your own property or route it to public storm drains per engineered plans.
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