Lot Coverage Limits: Kaneohe vs Urban Honolulu
How do lot coverage limits rules compare between Kaneohe, HI and Urban Honolulu, HI?
Urban Honolulu has fewer restrictions than Kaneohe.
Kaneohe, HI
Honolulu County
Kaneohe residential lots must meet ROH Sec. 21-3.70-1 impervious-surface caps. Dwellings permitted after May 1, 2019 are limited to 75 percent impervious coverage to manage runoff into Kaneohe Bay.
View full Kaneohe rules →Urban Honolulu, HI
Honolulu County
Urban Honolulu caps impervious surface at 75 percent of lot area for residential dwellings permitted after May 1, 2019, under ROH 21-3.70-1 to manage runoff into the city's storm drains.
View full Urban Honolulu rules →Key Facts Comparison
| Fact | Kaneohe | Urban Honolulu |
|---|---|---|
| - | - | |
| Impervious cap | - | 75 percent |
| Effective date | - | May 1, 2019 |
| Code section | - | ROH 21-3.70-1 |
| Flood concern | - | Ala Wai drainage |
Highlighted rows indicate differences between cities.
Kaneohe FAQ
Can I build a larger driveway by using pavers?
Yes, many pervious paver systems count as partially or fully pervious, allowing more hardscape area within the cap.
Does a swimming pool count as impervious?
Yes, pools and their surrounding decks typically count as impervious for coverage calculations.
Urban Honolulu FAQ
How much of an Urban Honolulu lot can be paved?
For residential dwellings permitted after May 1, 2019, ROH 21-3.70-1 limits impervious coverage to 75 percent. Older homes follow the standards in effect when they were permitted.
Do pool decks count toward Honolulu lot coverage?
Generally yes. Pool decks, patios, driveways, and roofed accessory structures count toward the 75 percent impervious cap under ROH 21-3.70-1. Pervious pavers with approved drainage can earn partial credit.
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