ADU Rules: East Honolulu vs Mililani Town
How do adu rules rules compare between East Honolulu, HI and Mililani Town, HI?
East Honolulu has fewer restrictions than Mililani Town.
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 Town, HI
Honolulu County
Mililani Town homeowners may build one ADU per zoning lot under ROH Sec. 21-5.720, but HOA covenants and association design rules often impose additional restrictions on top of city code.
View full Mililani Town rules →Key Facts Comparison
| Fact | East Honolulu | Mililani Town |
|---|---|---|
| - | - |
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 Town FAQ
Does Mililani Town allow ADUs?
City zoning allows one ADU per eligible lot, but the Mililani Town Association and your neighborhood association may restrict or prohibit them. Always check your CC&Rs first.
Can I rent my Mililani ADU short-term?
No. City rules require 30-day minimum rentals under ROH Sec. 21-5.720, and most Mililani HOAs additionally restrict short-term rentals.
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