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🌍 Environmental Rules/Flood Zones

Ewa Gentry vs Mililani Town

How do flood zones rules compare between Ewa Gentry, HI and Mililani Town, HI?

Mililani Town has fewer restrictions than Ewa Gentry.

Ewa Gentry, HI

Honolulu County

Heavy Restrictions

Ewa Gentry parcels mapped within FEMA special flood hazard areas are regulated by ROH Chapter 21A, which sets elevation and construction standards for floodplain development.

View full Ewa Gentry rules β†’

Mililani Town, HI

Honolulu County

Some Restrictions

Most of Mililani Town is outside high-risk flood zones, but drainage ways and gulches fall under ROH Chapter 21A elevation and variance standards where they apply.

View full Mililani Town rules β†’

Key Facts Comparison

FactEwa GentryMililani Town
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Highlighted rows indicate differences between cities.

Ewa Gentry FAQ

How do I know if my Ewa Gentry home is in a flood zone?

Check the FEMA Flood Insurance Rate Map adopted by Sec. 21A-1.5 or contact the Department of Planning and Permitting for a formal determination.

Can I get a variance from flood elevation standards?

Sec. 21A-1.12 provides a flood variance procedure, but it is limited and requires specific findings about hardship and compliance with federal standards.

Mililani Town FAQ

How do I find my Mililani flood zone?

Use FEMA's online flood map service or ask Honolulu DPP for a zone determination using your tax map key.

Do I need flood insurance if I am not in a high-risk zone?

It is optional in most Mililani areas, though lenders may still require it for gulch-adjacent parcels.

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