Mililani Town Zoning & Land Use Guide
Key Zoning Facts
Mililani Town Zoning Overview
Mililani Town is a master-planned community in central Oahu, developed beginning in the 1960s by Castle & Cooke on former pineapple plantation land. As a census-designated place within the City and County of Honolulu, zoning is administered by the Honolulu Department of Planning and Permitting. However, the Mililani Town Association exercises significant control over property modifications through its CC&Rs, which often impose standards more restrictive than the county zoning code.
The community was designed with a mix of single-family homes, townhouses, parks, and commercial centers arranged around a central town center. Its planned nature means that development patterns are more uniform than in older Oahu communities, with consistent lot sizes, architectural standards, and landscaping requirements. Mililani's central location on the H-2 freeway corridor provides access to both the urban core of Honolulu and the developing west side, making it a popular residential choice for families.
Key Zoning Districts
Mililani Town is primarily zoned R-5 and R-3.5 for single-family residential use, reflecting the planned community's design. The Mililani Town Center and Mililani Shopping Center carry B-1 commercial zoning. Townhouse areas are typically zoned A-1. Adjacent agricultural land outside the community is classified under the state Land Use Commission's agricultural district.
ADU Regulations
While Honolulu's ohana unit ordinance technically applies in Mililani Town, the Mililani Town Association's CC&Rs may restrict or prohibit accessory dwelling units. Property owners must obtain approval from both the county and the community association. This dual approval process can be a significant hurdle for ADU construction in the planned community.
Development Process
Building permits are processed by the Honolulu Department of Planning and Permitting. In addition, the Mililani Town Association's Design Committee must review and approve exterior modifications, additions, and new construction within the community. This private review process runs parallel to the county permitting process.
Regulatory Layers That Apply in Mililani Town
Your property is subject to ALL of these regulatory layers. Each one can impose additional requirements beyond the others.
Federal
- FEMA Flood Zones: Applicable
- View FEMA Flood Map
County — Honolulu County
- Role: Property records, tax assessment, unincorporated area planning
City / Municipal
The city's zoning ordinance, building codes, and local permits form the primary layer of land-use regulation for your property.
Overlay Districts
No overlay districts identified.
Private Restrictions
- HOA / CC&Rs common: Yes
- Check HOA CC&Rs for additional restrictions. Mililani Town Association enforces community standards.
Primary Zoning Districts
- Min Lot
- 5,000 sq ft
- Max Height
- 25 ft
- Front Setback
- 15 ft
- Side Setback
- 5 ft
- Rear Setback
- 10 ft
- Min Lot
- 3,500 sq ft
- Max Height
- 25 ft
- Front Setback
- 10 ft
- Side Setback
- 5 ft
- Rear Setback
- 5 ft
- Min Lot
- None
- Max Height
- 40 ft
- Front Setback
- 10 ft
- Side Setback
- 0 ft
- Rear Setback
- 10 ft
ADU Rules in Mililani Town
- Max Size
- 800 sq ft
- Max Height
- 25 ft
- Rear Setback
- 5 ft
- Side Setback
- 5 ft
- Parking
- 1 off-street space required
- Owner Occupancy
- Owner must occupy either the primary or accessory dwelling
- Permit Timeline
- 60-90 days
Permit Costs & Timelines
Permit Costs & Timelines
Specific permit fee schedules for Mililani Town are available from the local planning department. Fees vary based on project type, scope, and valuation.
Check Mililani Town permit fees →