Permit Requirements: East Honolulu vs Mililani Town
How do permit requirements rules compare between East Honolulu, HI and Mililani Town, HI?
East Honolulu and Mililani Town have similar restriction levels.
East Honolulu, HI
Honolulu County
East Honolulu homeowners from Aina Haina to Hawaii Kai apply for fence and wall permits under ROH 18-3.1, which exempts retaining or riprap walls up to 30 inches from the building permit requirement.
View full East Honolulu rules →Mililani Town, HI
Honolulu County
Mililani Town fence permits follow ROH Sec. 18-3.1 thresholds. Retaining walls up to 30 inches are exempt, but most taller fences or masonry walls need a City permit plus HOA design approval first.
View full Mililani Town rules →Key Facts Comparison
| Fact | East Honolulu | Mililani Town |
|---|---|---|
| Permit exemption | 30 inches or less | - |
| Issuing agency | Honolulu DPP | - |
| Code section | ROH 18-3.1 | - |
| Hillside review | Engineered drawings | - |
| - | - |
Highlighted rows indicate differences between cities.
East Honolulu FAQ
Do I need a permit for a Hawaii Kai fence?
Usually yes. ROH 18-3.1 only exempts retaining or riprap walls up to 30 inches. Taller walls, masonry fences, and pool barriers require a Honolulu DPP permit before construction starts.
Are hillside walls reviewed more strictly?
Yes. Kuliouou and Hawaii Loa hillside lots often need engineered drawings and drainage analysis for retaining walls above 30 inches, on top of the standard 18-3.1 building permit process.
Mililani Town FAQ
Is HOA approval a substitute for a city permit?
No, the two processes are separate; HOA approval handles aesthetics while the city permit confirms code compliance.
How long does the Mililani permit process take?
HOA review can take 2 to 6 weeks, and city building permits typically another 2 to 8 weeks depending on complexity.
Compare other topics
See how East Honolulu and Mililani Town compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool