ADU Rules: East Honolulu vs Mililani Mauka
How do adu rules rules compare between East Honolulu, HI and Mililani Mauka, HI?
East Honolulu has fewer restrictions than Mililani Mauka.
East Honolulu, HI
Honolulu County
East Honolulu homeowners in Hawaii Kai and Aina Haina may build one accessory dwelling unit per zoning lot in eligible residential districts, subject to parking, occupancy, and rental-duration limits under the Honolulu Land Use Ordinance.
View full East Honolulu rules →Mililani Mauka, HI
Honolulu County
Mililani Mauka homeowners may build one ADU per zoning lot under ROH Sec. 21-5.720 if city rules and the Mililani Mauka Community Association covenants allow, with parking and 30-day rental minimums required.
View full Mililani Mauka rules →Key Facts Comparison
| Fact | East Honolulu | Mililani Mauka |
|---|---|---|
| - | - |
Highlighted rows indicate differences between cities.
East Honolulu FAQ
Can I build an ADU on my Hawaii Kai lot?
Likely yes if your lot is in R-5, R-7.5, or R-10 zoning and meets minimum size requirements. Check with DPP before applying for your permit.
Can I rent my ADU on Airbnb?
No. ADUs in Honolulu may only be rented for periods of 30 days or longer under current ordinance rules.
Mililani Mauka FAQ
Does the Mililani Mauka HOA allow ADUs?
Check the Mililani Mauka Community Association design guidelines; approval is required before any city permit can legally be used on a covenanted lot.
Can I rent my ADU short-term?
No. Rentals under 30 days are prohibited in ADUs under city rules.
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