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🌍 Environmental Rules/Flood Zones

Flood Zones: Kaneohe vs Mililani Mauka

How do flood zones rules compare between Kaneohe, HI and Mililani Mauka, HI?

Mililani Mauka has fewer restrictions than Kaneohe.

Kaneohe, HI

Honolulu County

Heavy Restrictions

Low-lying Kaneohe neighborhoods fall within FEMA flood zones and must follow ROH Chapter 21A elevation, foundation, and variance standards for any construction.

View full Kaneohe rules β†’

Mililani Mauka, HI

Honolulu County

Some Restrictions

Most Mililani Mauka parcels sit on elevated terrain outside special flood hazard areas, but ROH Chapter 21A still governs any properties mapped within FEMA flood zones.

View full Mililani Mauka rules β†’

Key Facts Comparison

FactKaneoheMililani Mauka
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Highlighted rows indicate differences between cities.

Kaneohe FAQ

How do I check my Kaneohe flood zone?

Use the FEMA Flood Map Service Center or contact Honolulu DPP with your tax map key to confirm your zone.

Can I add living space below BFE?

No, habitable finished space below the base flood elevation is generally not allowed under Chapter 21A.

Mililani Mauka FAQ

Is my Mililani Mauka home likely in a flood zone?

Most upland lots are in Zone X, but parcels near stream corridors can fall within mapped flood zones; verify using the FEMA FIRM or ask DPP.

What if my project is near a drainage easement?

Drainage easements often carry mapped flood zones, so Chapter 21A elevation and construction standards may apply to any new construction nearby.

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