Flood Zones: Ewa Gentry vs Urban Honolulu
How do flood zones rules compare between Ewa Gentry, HI and Urban Honolulu, HI?
Ewa Gentry and Urban 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 →Urban Honolulu, HI
Honolulu County
Urban Honolulu's Mapunapuna, Waikiki fringe, and Kakaako makai properties lie in FEMA special flood hazard areas adopted under ROH Sec. 21A-1.5, with elevation and floodproofing required under Sec. 21A-1.8.
View full Urban Honolulu rules →Key Facts Comparison
| Fact | Ewa Gentry | Urban Honolulu |
|---|---|---|
| - | - | |
| Authority | - | ROH Chapter 21A |
| Map source | - | FEMA FIRM |
| Elevation rule | - | Sec. 21A-1.8 |
| Variance | - | Sec. 21A-1.12 |
| Urban hot spots | - | Mapunapuna, Waikiki, Kakaako |
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.
Urban Honolulu FAQ
Is Mapunapuna really in a flood zone?
Yes. FEMA FIRMs adopted under Sec. 21A-1.5 place much of Mapunapuna in a special flood hazard area, with chronic tidal flooding driving elevation and floodproofing requirements.
Can a Waikiki tower project get a flood variance?
Only under Sec. 21A-1.12 hardship standards, which are narrowly applied. Urban Honolulu variances are rare, and denials preserve NFIP insurance rating for surrounding structures.
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