ADU rules in Mililani Town, HI — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Mililani Town homeowners may build one ADU per zoning lot under ROH Sec. 21-5.720, but HOA covenants and association design rules often impose additional restrictions on top of city code.
Under ROH Sec. 21-5.720, one ADU is allowed per zoning lot in Country, R-3.5, R-5, R-7.5, R-10, and R-20 districts, covering Mililani Town residential neighborhoods. Rentals must be 30 days or longer. However, Mililani Town's master-planned community is governed by the Mililani Town Association (MTA) and individual neighborhood associations whose CC&Rs may restrict or prohibit ADUs, accessory rentals, and exterior modifications even when zoning allows them. Homeowners must obtain both city permits and HOA approval. After-the-fact permits may be available for pre-September 2015 units.
Unpermitted ADUs face city enforcement and potential daily fines; HOA violations can trigger association fines and legal action.
Mililani Town, HI
Residential pools in Mililani Town must meet ROH Sec. 16-6.2 barrier standards. Fences at least 48 inches high with self-closing gates are required, on top o...
Mililani Town, HI
Mililani Town retaining walls follow ROH Sec. 21-4.40 rules and HOA review. Fill-retaining walls in required yards cannot exceed 6 feet, and terraced walls a...
Mililani Town, HI
Mililani Town fence materials are limited by both ROH Sec. 21-4.60 definitions and MTA/MMA design guidelines, which typically restrict visible front-yard mat...
Mililani Town, HI
Mililani Town neighbor fence disputes are governed by ROH Sec. 21-4.30 yard rules plus HOA covenants. Honolulu has no spite-fence ordinance, making HOA media...
Mililani Town, HI
Public parks in Mililani Town close during posted night hours under ROH Sec. 10-1.2, while HOA recreation centers follow separate private hours set by the as...
Mililani Town, HI
Mililani Town follows the state juvenile curfew under HRS Sec. 577-16 barring children under 16 from public places between 10 p.m. and 4 a.m. without a paren...
Side-by-side rule comparisons with other cities in Honolulu County.
See how other cities in Honolulu County handle adu rules.
See how Mililani Town's adu rules rules stack up against other locations.
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