Tiny Homes: Honolulu vs Mililani Town
How do tiny homes rules compare between Honolulu, HI and Mililani Town, HI?
Honolulu has fewer restrictions than Mililani Town.
Honolulu, HI
Honolulu County
Honolulu has no dedicated tiny-home ordinance. Permanent tiny homes on foundations are regulated as ADUs under ROH Sec. 21-5.720, while movable tiny homes on wheels are not permitted as permanent dwellings in residential districts.
View full Honolulu rules →Mililani Town, HI
Honolulu County
Mililani Town has no dedicated tiny home ordinance and its HOA framework effectively prohibits tiny homes on wheels, with permanent tiny homes regulated as ADUs.
View full Mililani Town rules →Key Facts Comparison
| Fact | Honolulu | Mililani Town |
|---|---|---|
| Governing Section | ROH Sec. 21-5.720 | - |
| Building Code | ROH Sec. 16-1.1 | - |
| Tiny Homes on Wheels | Not permanent dwellings | - |
| ADU Limit | One per zoning lot | - |
| - | - |
Highlighted rows indicate differences between cities.
Honolulu FAQ
Are tiny homes legal on Oahu?
Yes, if they are built on a permanent foundation and comply with ADU rules under ROH Sec. 21-5.720. Tiny homes on wheels are not permitted as permanent residences.
Can I park a tiny house on wheels in my yard and live in it?
No. Recreational-vehicle-style tiny homes cannot be used as a permanent dwelling in Honolulu residential districts under the Land Use Ordinance.
Mililani Town FAQ
Can I have a tiny home in Mililani Town?
A permanent tiny home on foundation might qualify as an ADU under Sec. 21-5.720, but HOA approval is usually required and often restrictive. Tiny homes on wheels are not allowed as dwellings.
Can I store a tiny house on wheels in my Mililani driveway?
Most Mililani HOA covenants restrict storing RVs or trailers in driveways. Check your specific association rules.
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