Height Limits: Honolulu vs Mililani Town
How do height limits rules compare between Honolulu, HI and Mililani Town, HI?
Honolulu and Mililani Town have similar restriction levels.
Honolulu, HI
Honolulu County
Honolulu's Land Use Ordinance limits residential fences to 6 feet in side and rear yards and 4 feet in front yards. Fences over 6 feet require a Department of Planning and Permitting building permit.
View full Honolulu rules →Mililani Town, HI
Honolulu County
Mililani Town fences follow ROH Sec. 21-4.60 height rules on top of Mililani Town Association design guidelines. Front-yard barriers over 36 inches require setbacks or landscaping, while side and rear fences generally reach 6 feet.
View full Mililani Town rules →Key Facts Comparison
| Fact | Honolulu | Mililani Town |
|---|---|---|
| Side/rear yard max height | 6 feet (no permit) | - |
| Front yard max height | 4 feet residential | - |
| Permit-free threshold | 30 inches or under | - |
| Permit required above | 6 feet | - |
| Enforcing agency | Dept. of Planning and Permitting | - |
| - | - |
Highlighted rows indicate differences between cities.
Honolulu FAQ
Do I need a permit for a 6-foot privacy fence in a residential area?
A fence between 30 inches and 6 feet may qualify for Honolulu's instant online permit. Fences over 6 feet require a full building permit with structural review from DPP.
Are there different rules for corner lots?
Yes. Corner lots must comply with sight-triangle requirements to preserve driver and pedestrian visibility, potentially limiting fence height and placement near intersections.
Mililani Town FAQ
Do I need HOA approval for a backyard fence?
Yes, both MTA and MMA design guidelines typically require architectural review for any new or replacement fence, even within ROH limits.
Can I install a 4-foot wrought iron front fence?
Possibly, but the front yard 36-inch rule would require a setback or landscape buffer, and HOA design review would also apply.
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