Kailua residential lots follow ROH Sec. 21-3.70-1, which limits impervious surface coverage. Homes permitted after May 1, 2019 are capped at 75 percent impervious coverage to reduce runoff and protect windward watersheds.
ROH 21-3.70-1 sets residential development standards including impervious-surface caps across Kailua zoning districts. For dwellings permitted on or after May 1, 2019, a 75 percent impervious cap applies, counting buildings, driveways, walkways, and pool decks. This matters for Kailua's low-lying parcels that drain toward Kawainui Marsh and the bay. Pervious pavers, gravel, and landscaped areas count as pervious. Older homes may be grandfathered but expansions trigger re-evaluation. Lot area, floor-area ratio, and setback rules interact with coverage caps, so larger homes on small lots are often the first to hit the cap.
Over-coverage discovered during permit review stops projects; retroactive discovery may require removal of non-compliant surfaces and landscape restoration.
Kailua, HI
Residential pool barriers in Kailua must meet ROH Sec. 16-6.2, which mandates fencing and other protective devices around swimming pools. These rules reduce ...
Kailua, HI
Retaining walls in Kailua follow ROH Sec. 21-4.40, which caps fill-retention walls within required yards at 6 feet. Terraced walls count toward combined heig...
Kailua, HI
Kailua fence materials are defined under ROH Sec. 21-4.60, which recognizes wrought iron, wire, wood, vinyl, plastic, and masonry with post foundations. Corr...
Kailua, HI
Fences along shared property lines in Kailua are governed by ROH Sec. 21-4.30 yard and setback rules. Honolulu has no dedicated spite-fence statute, so dispu...
Kailua, HI
Kailua public parks are closed to entry during posted night hours under ROH Sec. 10-1.2, with narrow exceptions for traversing beach parks to reach the shore...
Kailua, HI
Kailua follows the state juvenile curfew under HRS Sec. 577-16, which bars children under 16 from public places between 10:00 p.m. and 4:00 a.m. without a pa...
Side-by-side rule comparisons with other cities in Honolulu County.
See how other cities in Honolulu County handle lot coverage limits.
See how Kailua's lot coverage limits rules stack up against other locations.
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