Ewa Gentry vs Mililani Town
How do grading & drainage rules compare between Ewa Gentry, HI and Mililani Town, HI?
Mililani Town has fewer restrictions than Ewa Gentry.
Ewa Gentry, HI
Honolulu County
Ewa Gentry grading, grubbing, stockpiling, and drainage work is regulated under ROH Chapter 18A, which requires permits, bonds, and inspections for qualifying land-disturbing activity.
View full Ewa Gentry rules →Mililani Town, HI
Honolulu County
Mililani cut, fill, and trenching projects generally require a grading permit under ROH Chapter 18A, with drainage review to protect neighbors and downstream gulches.
View full Mililani Town rules →Key Facts Comparison
| Fact | Ewa Gentry | Mililani Town |
|---|---|---|
| - | - |
Highlighted rows indicate differences between cities.
Ewa Gentry FAQ
Do I need a grading permit to regrade my Ewa Gentry backyard?
If the work exceeds the volume or slope thresholds in Chapter 18A, a grading permit is required along with any needed erosion control plan.
What happens if I grade without a permit?
Sec. 18A-2.4A treats grading without a permit as a violation, which can lead to stop work orders, penalties, and required remediation.
Mililani Town FAQ
Do ADUs need a grading permit?
Many ADU projects require grading permits due to foundation excavation and drainage modifications around the structure.
Can I reroute roof runoff to my neighbor's lot?
No. Drainage must be directed to approved on-site locations or the public storm system, not onto adjacent properties.
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