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🌍 Environmental Rules/Grading & Drainage

Grading & Drainage: Kapolei vs Mililani Mauka

How do grading & drainage rules compare between Kapolei, HI and Mililani Mauka, HI?

Kapolei and Mililani Mauka have similar restriction levels.

Kapolei, HI

Honolulu County

Heavy Restrictions

Kapolei grading, grubbing, stockpiling, and drainage work is regulated by ROH Chapter 18A, which requires permits, bonds, and inspections for qualifying land-disturbing activity.

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Mililani Mauka, HI

Honolulu County

Heavy Restrictions

Mililani Mauka 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 Mililani Mauka rules β†’

Key Facts Comparison

FactKapoleiMililani Mauka
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Highlighted rows indicate differences between cities.

Kapolei FAQ

Do I need a permit for a retaining wall and regrade in Kapolei?

Yes, if the project meets the thresholds in Chapter 18A, you need a grading permit and often an erosion and sediment control plan.

What if I find my contractor graded without a permit?

Sec. 18A-2.4A treats this as a violation, and the Department of Planning and Permitting can issue penalties and require corrective measures.

Mililani Mauka FAQ

Do I need a grading permit for a small Mililani Mauka yard terrace?

If the work meets Chapter 18A's volume, slope, or height thresholds, a grading permit is required along with any necessary erosion control plan.

What about a contractor stockpiling soil on my lot?

Stockpiling above the thresholds in Article 3 requires a permit under Chapter 18A, and failing to permit can lead to penalties under Sec. 18A-2.4A.

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