Flood Zones: Ewa Gentry vs Honolulu
How do flood zones rules compare between Ewa Gentry, HI and Honolulu, HI?
Ewa Gentry and Honolulu have similar restriction levels.
Ewa Gentry, HI
Honolulu County
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 →Honolulu, HI
Honolulu County
Honolulu enforces FEMA flood zone construction standards under ROH chapter 21A and uses the city's Sea Level Rise Vulnerability Viewer to guide permits in low-lying coastal neighborhoods.
View full Honolulu rules →Key Facts Comparison
| Fact | Ewa Gentry | Honolulu |
|---|---|---|
| - | - | |
| Local code | - | ROH Chapter 21A |
| Substantial improvement | - | 50 percent of value |
| Required document | - | Elevation Certificate |
| Map source | - | FEMA plus state SLR viewer |
| Permit agency | - | Honolulu DPP |
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.
Honolulu FAQ
How do I check if my Oahu property is in a flood zone?
Use the city's online flood hazard map and the State of Hawaii Sea Level Rise Viewer. DPP can also issue a written flood zone determination based on the current FEMA panels.
Does sea level rise affect my permit today?
Honolulu has begun incorporating sea level rise data into shoreline setback and SMA reviews, and freeboard above base flood elevation is strongly encouraged for new oceanfront construction.
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