ADU Rules: Ewa Gentry vs Kailua
How do adu rules rules compare between Ewa Gentry, HI and Kailua, HI?
Ewa Gentry and Kailua have similar restriction levels.
Ewa Gentry, HI
Honolulu County
Ewa Gentry homeowners may build one accessory dwelling unit per zoning lot in eligible residential districts, subject to Honolulu LUO size, parking, occupancy, and rental duration rules under ROH Sec. 21-5.720.
View full Ewa Gentry rules →Kailua, HI
Honolulu County
Kailua homeowners may add one ADU per zoning lot in eligible residential districts, subject to city-wide density, parking, occupancy, and rental-duration restrictions set by the Honolulu Land Use Ordinance.
View full Kailua rules →Key Facts Comparison
| Fact | Ewa Gentry | Kailua |
|---|---|---|
| - | - |
Highlighted rows indicate differences between cities.
Ewa Gentry FAQ
Can I build an ADU on my Ewa Gentry lot?
If your lot meets the minimum size for your zoning district (commonly R-5 or R-3.5) and you can provide parking, one ADU is generally allowed under ROH Sec. 21-5.720. Check your HOA covenants first.
Can I rent my ADU on Airbnb?
No. Rentals under 30 days are prohibited in ADUs citywide. Only monthly or longer-term leases are allowed.
Kailua FAQ
Can I rent my Kailua ADU on Airbnb?
No. ADUs require a minimum 30-day rental term and cannot operate as short-term vacation rentals, which are separately regulated and heavily restricted on the windward side.
How many ADUs can I build on my Kailua lot?
Only one ADU is allowed per zoning lot, regardless of lot size, under ROH Sec. 21-5.720.
Do I need a permit for an ADU in Kailua?
Yes, a building permit and compliance with ADU zoning standards are required. Unpermitted ADUs built before September 14, 2015 may qualify for after-the-fact permitting.
Compare other topics
See how Ewa Gentry and Kailua 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