Waipahu land disturbing activities require grading permits under ROH Chapter 18A, which governs permits, bonds, inspections, and drainage review for all qualifying work.
Chapter 18A is the primary city chapter for grading, soil erosion, and sediment control. Article 2 covers permits, bonds, and inspection. Sec. 18A-2.2 governs grading permit applications, and Sec. 18A-2.4A sets penalties for grading without a permit. Article 3 covers grading, grubbing, and stockpiling. Waipahu's dense lots and plantation-era drainage infrastructure mean new driveways, retaining walls, pool excavations, and fill operations commonly trigger grading permits. Drainage review within the permit ensures runoff does not overwhelm neighboring parcels or legacy drainage ditches flowing to Pearl Harbor.
Grading without a permit, exceeding approved quantities, or non-compliant drainage handling can result in penalties under Sec. 18A-2.4A and stop-work orders.
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Waipahu, HI
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