ROH Sec. 21-3.70-1 imposes impervious-surface caps on Mililani Mauka lots, including a 75 percent impervious limit for dwellings permitted after May 1, 2019.
Mililani Mauka's mature residential neighborhoods feel the impact of 21-3.70-1's impervious limits, particularly when owners try to add pools, ADUs, or expanded driveways. For dwellings permitted after May 1, 2019, total impervious area, including roofs, driveways, walkways, and patios, is capped at 75 percent. Pervious pavers and carefully designed landscaping can help keep projects within the cap. Central Oahu's seasonal rainfall makes stormwater management important, so the city enforces these rules seriously. MTA guidelines may also restrict hardscape visible from the street.
Plan check denials, required removal of over-paved area, and fines for non-compliance.
Mililani Mauka, HI
ROH Sec. 21-4.40 limits fill-retaining walls in Mililani Mauka yards to six feet and combines terraced wall heights, important on the community's sloped Cent...
Mililani Mauka, HI
ROH Sec. 21-4.30 sets the baseline yard and street setbacks for Mililani Mauka, with 21-3.70-1 supplying district-specific minimums for the community's resid...
Mililani Mauka, HI
ROH Sec. 21-4.60 sets maximum structure heights for Mililani Mauka, with residential districts typically capping homes at 25 to 30 feet and applying sloped e...
Side-by-side rule comparisons with other cities in Honolulu County.
See how other cities in Honolulu County handle lot coverage limits.
See how Mililani Mauka's lot coverage limits rules stack up against other locations.
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