Palo Alto vs Sunnyvale
How do grading & drainage rules compare between Palo Alto, CA and Sunnyvale, CA?
Palo Alto, CA
Santa Clara County
Palo Alto requires grading permits for significant earthwork with drainage plans ensuring runoff does not harm neighbors or overwhelm stormwater systems.
View full Palo Alto rules →Sunnyvale, CA
Santa Clara County
No data available yet for Sunnyvale.
Key Facts Comparison
| Fact | Palo Alto | Sunnyvale |
|---|---|---|
| Permit Trigger | ~50 cu yd or deep excavation | - |
| Retaining Walls | Over 4 ft engineered permit | - |
| Drainage Plans | Required for grading permits | - |
| Neighbor Rights | Cannot divert water onto | - |
| Hillside Review | Geotech for steep lots | - |
Highlighted rows indicate differences between cities.
Palo Alto FAQ
Do I need a permit for landscaping grading?
Minor landscaping below permit thresholds is typically exempt, but substantial regrading, new retaining walls over 4 ft, or drainage changes require permits.
What if a neighbor's grading floods my yard?
Report to code enforcement and document damage. Civil law holds neighbors liable for drainage changes that cause damage, in addition to potential code violations.
Sunnyvale FAQ
No FAQs available.
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