Grading & Drainage: Kaneohe vs Urban Honolulu
How do grading & drainage rules compare between Kaneohe, HI and Urban Honolulu, HI?
Kaneohe has fewer restrictions than Urban Honolulu.
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 →Urban Honolulu, HI
Honolulu County
Tower excavations and infill projects in Urban Honolulu must obtain grading permits under ROH Chapter 18A, with dewatering, shoring, and drainage coordination critical in Kakaako and Ala Moana's high water-table conditions.
View full Urban Honolulu rules →Key Facts Comparison
| Fact | Kaneohe | Urban Honolulu |
|---|---|---|
| - | - | |
| Authority | - | ROH Chapter 18A |
| Application | - | Sec. 18A-2.2 |
| No-permit penalty | - | Sec. 18A-2.4A |
| Urban concern | - | Dewatering, shoring |
| Bonds | - | Required |
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.
Urban Honolulu FAQ
Does a Kakaako tower need a grading permit even on a small lot?
Yes. Basement excavation easily exceeds Chapter 18A thresholds, and Sec. 18A-2.2 requires a full permit application including hydrology and shoring plans before work.
How is dewatering handled in Urban Honolulu excavations?
Grading plans must coordinate with ROH Chapter 43 Article 11 stormwater rules. Dewatering discharges typically require separate NPDES coverage and cannot be released untreated.
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