ADU rules in Mililani Mauka, HI — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Mililani Mauka homeowners may build one ADU per zoning lot under ROH Sec. 21-5.720 if city rules and the Mililani Mauka Community Association covenants allow, with parking and 30-day rental minimums required.
The Honolulu Land Use Ordinance at ROH Sec. 21-5.720 permits one accessory dwelling unit per zoning lot in Country, R-3.5, R-5, R-7.5, R-10, and R-20 districts, which covers much of Mililani Mauka. Ordinance 25-2 refined size, parking, occupancy, and after-the-fact permit pathways. However, the Mililani Mauka Community Association's CC&Rs and design review committee apply on top of the city code and may prohibit or significantly restrict ADUs, including limits on secondary dwellings, exterior modifications, and rentals. Homeowners should secure association approval before submitting a city permit, and remember that ADU rentals under 30 days are prohibited citywide.
Unpermitted work can trigger DPP notices of violation, daily fines, and additional HOA enforcement actions.
Mililani Mauka, HI
ROH Sec. 16-6.2 requires Mililani Mauka residential pools to be fully enclosed by a compliant fence or protective device to prevent unsupervised access by yo...
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. 21-4.60 defines fences to include wrought iron, wire, wood, vinyl, and plastic, but the Mililani Mauka HOA design code narrows the palette considera...
Mililani Mauka, HI
ROH Sec. 21-4.30 governs what Mililani Mauka neighbors can build in required yards along shared property lines, with the city relying on yard and height sect...
Mililani Mauka, HI
Public parks in Mililani Mauka close during posted night hours under ROH Sec. 10-1.2, and the Community Association's recreation centers have their own separ...
Mililani Mauka, HI
Mililani Mauka is covered by HRS Sec. 577-16, which prohibits children under 16 from public places between 10 p.m. and 4 a.m. unaccompanied; Honolulu has no ...
Side-by-side rule comparisons with other cities in Honolulu County.
See how other cities in Honolulu County handle adu rules.
See how Mililani Mauka's adu rules rules stack up against other locations.
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