Grading & Drainage: Kaneohe vs Waipahu
How do grading & drainage rules compare between Kaneohe, HI and Waipahu, HI?
Kaneohe has fewer restrictions than Waipahu.
Kaneohe, HI
Honolulu County
Most grading, cut, fill, or trenching projects in Kaneohe require a permit under ROH Chapter 18A, with drainage review to protect downslope neighbors and bay-bound streams.
View full Kaneohe rules →Waipahu, HI
Honolulu County
Waipahu land disturbing activities require grading permits under ROH Chapter 18A, which governs permits, bonds, inspections, and drainage review for all qualifying work.
View full Waipahu rules →Key Facts Comparison
| Fact | Kaneohe | Waipahu |
|---|---|---|
| - | - |
Highlighted rows indicate differences between cities.
Kaneohe FAQ
Do I need a permit to add a driveway?
New or substantially regraded driveways generally require a grading permit, especially on sloped Kaneohe lots.
Can I redirect my roof runoff?
Runoff must discharge in approved locations and not onto neighboring property or directly into the storm drain system.
Waipahu FAQ
Does adding fill for a small Waipahu addition need a permit?
Yes, if the fill or grading exceeds thresholds in Chapter 18A. Even modest grading associated with additions typically requires a grading permit, so confirm with permitting before starting.
Can my neighbor's runoff come onto my lot?
Grading permit drainage review is intended to prevent concentrated runoff onto neighbors. If your neighbor's grading changed drainage, document it and contact the Department of Planning and Permitting.
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