Lot Coverage Limits: East Honolulu vs Pearl City
How do lot coverage limits rules compare between East Honolulu, HI and Pearl City, HI?
East Honolulu and Pearl City have similar restriction levels.
East Honolulu, HI
Honolulu County
East Honolulu residential lot coverage follows ROH 21-3.70-1, which caps impervious surface at 75 percent for dwellings permitted after May 1, 2019, impacting Hawaii Kai marina and ridge parcels.
View full East Honolulu rules →Pearl City, HI
Honolulu County
Pearl City lot coverage follows ROH 21-3.70-1, capping impervious surface at 75 percent for dwellings permitted after May 1, 2019, including homes in Waimalu, Manana, and Pearl City Highlands.
View full Pearl City rules →Key Facts Comparison
| Fact | East Honolulu | Pearl City |
|---|---|---|
| Impervious cap | 75 percent | 75 percent |
| Effective date | May 1, 2019 | May 1, 2019 |
| Code section | ROH 21-3.70-1 | ROH 21-3.70-1 |
| Drainage overlay | Chapter 14 applies | Chapter 14 applies |
Highlighted rows indicate differences between cities.
East Honolulu FAQ
What is the Hawaii Kai impervious limit?
Dwellings permitted after May 1, 2019 cap impervious surface at 75 percent of the lot under ROH 21-3.70-1. Pools, driveways, and patios count toward the limit, pushing designs toward permeable surfaces.
Do older Portlock homes have to comply?
Pre-2019 homes that exceed the 75 percent cap are typically legally nonconforming. Substantial redevelopment or expansion can trigger full compliance with the current ROH 21-3.70-1 limit.
Pearl City FAQ
What is the Pearl City impervious limit?
Dwellings permitted after May 1, 2019 cap impervious surface at 75 percent of the lot under ROH 21-3.70-1. Driveways, pool decks, and patios count, pushing designs toward permeable surfaces.
Do older Manana homes have to comply?
Pre-2019 homes exceeding the 75 percent cap are typically legally nonconforming. Substantial redevelopment or expansion can trigger full compliance with the current ROH 21-3.70-1 impervious cap.
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