Flood Zones: Kapolei vs Mililani Mauka
How do flood zones rules compare between Kapolei, HI and Mililani Mauka, HI?
Mililani Mauka has fewer restrictions than Kapolei.
Kapolei, HI
Honolulu County
Kapolei parcels within FEMA special flood hazard areas are regulated by ROH Chapter 21A, which sets elevation, flood-proofing, and variance standards for floodplain development.
View full Kapolei rules →Mililani Mauka, HI
Honolulu County
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 →Key Facts Comparison
| Fact | Kapolei | Mililani Mauka |
|---|---|---|
| - | - |
Highlighted rows indicate differences between cities.
Kapolei FAQ
Is my Kapolei property in a flood zone?
Check the FEMA FIRM adopted by Sec. 21A-1.5 or request a determination from the Department of Planning and Permitting before starting any project.
Can I build a finished basement in a Kapolei flood zone?
Below-base-flood-elevation occupied space is generally restricted under Chapter 21A's elevation standards for new construction and substantial improvements.
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.
Compare other topics
See how Kapolei and Mililani Mauka compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool