Setback Rules: Kailua vs Waipahu
How do setback rules rules compare between Kailua, HI and Waipahu, HI?
Kailua and Waipahu have similar restriction levels.
Kailua, HI
Honolulu County
Kailua construction follows ROH Sec. 21-4.30 yard and street setbacks, plus district-specific standards in 21-3.70-1 for residential zoning. Setbacks preserve light, air, and neighborhood character across windward Oahu.
View full Kailua rules →Waipahu, HI
Honolulu County
Waipahu residential setbacks apply ROH 21-4.30 yard rules and ROH 21-3.70-1 district specifics, with tight plantation lots often grandfathered to lower setbacks than current code requires.
View full Waipahu rules →Key Facts Comparison
| Fact | Kailua | Waipahu |
|---|---|---|
| - | - | |
| Primary section | - | ROH 21-4.30 |
| Residential specifics | - | ROH 21-3.70-1 |
| R-5 front yard | - | 10 feet typical |
| Legacy lots | - | Often nonconforming |
Highlighted rows indicate differences between cities.
Kailua FAQ
How close to the street can I build?
Most Kailua residential lots require a 10-foot front setback under ROH 21-4.30, though specifics depend on the zoning district.
Do beachfront setbacks differ?
Yes, shoreline lots near Kailua Beach must also meet state shoreline setback and SMA requirements on top of county rules.
Waipahu FAQ
What setback applies to a Waipahu home?
Most Waipahu R-5 lots require a 10-foot front yard and 5-foot side and rear yards under ROH 21-4.30 and 21-3.70-1. Plantation-era homes on narrow lots may be grandfathered with smaller setbacks.
Can I add an ADU on a small plantation lot?
Possibly. ADUs must meet ROH 21-4.30 setbacks plus ADU-specific rules. Narrow plantation lots often lack the side yard required for an ADU, so DPP pre-review with a licensed design professional is recommended.
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