Lot Coverage Limits: Kailua vs Urban Honolulu

Does a gravel driveway count against coverage?

Gravel is generally treated as pervious, helping stay under the 75 percent cap, though compacted surfaces may count differently.

What if my existing home already exceeds 75 percent?

Older lots may be grandfathered, but any major expansion or rebuild will typically require compliance with current caps.

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.