Hawaii Flood Zones Law: Statewide Environmental Rules Rules (2026)

Key Facts

Program: NFIP coordinated state
Authority: DLNR and counties
Standard: BFE elevation required
Statute: HRS Chapter 179

Full Breakdown

Under HRS Chapter 179 and federal NFIP requirements coordinated through the Department of Land and Natural Resources, all Hawaii counties must enforce floodplain management standards. New residential construction in Special Flood Hazard Areas must have lowest floors elevated to or above the base flood elevation. Non-residential structures may be floodproofed instead. Substantial improvements to existing buildings trigger full compliance. Counties issue floodplain development permits but cannot offer standards weaker than state and federal NFIP minimums or risk losing federal flood insurance availability.

Violations & Penalties

Unpermitted flood zone construction can result in fines, mandatory removal, denial of flood insurance, and county loss of NFIP eligibility.

Frequently Asked Questions

Do I need a permit to build in a Hawaii flood zone?

Yes. Construction in a Special Flood Hazard Area requires a county floodplain development permit. New homes must be elevated to or above the base flood elevation under NFIP rules.

Can Hawaii counties allow lower flood elevations than the state?

No. Counties must meet or exceed NFIP and state minimum standards. Weaker rules would jeopardize residents' federal flood insurance and trigger state enforcement action.

Hawaii Flood Hazard Area Construction Standards

Key Facts

Full Breakdown

Violations & Penalties

Frequently Asked Questions

Sources

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