Retaining Walls: Kaneohe vs Mililani Mauka
How do retaining walls rules compare between Kaneohe, HI and Mililani Mauka, HI?
Kaneohe and Mililani Mauka have similar restriction levels.
Kaneohe, HI
Honolulu County
Kaneohe's rolling terrain makes ROH Sec. 21-4.40 retaining wall rules especially relevant. Fill-retention walls in required yards cannot exceed 6 feet, and terraced walls are combined for height calculation.
View full Kaneohe rules →Mililani Mauka, HI
Honolulu County
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 Central Oahu grades.
View full Mililani Mauka rules →Key Facts Comparison
| Fact | Kaneohe | Mililani Mauka |
|---|---|---|
| - | - |
Highlighted rows indicate differences between cities.
Kaneohe FAQ
My lot drops 10 feet to the neighbor. Can I build one tall wall?
Not a single wall in a required yard; you would need terraced walls with drainage, stamped engineering, and permits.
Are rock-and-riprap walls treated differently?
Riprap walls up to 30 inches are permit-exempt, but larger or engineered rip rap typically needs permits and drainage design.
Mililani Mauka FAQ
Can I build a three-tier terrace instead of one tall wall?
Terraced walls are measured together under ROH 21-4.40, so stacking tiers does not sidestep the six-foot limit.
Must retaining wall finishes be approved by MTA?
Yes. Walls visible from the street typically require MTA approval for color and finish.
Compare other topics
See how Kaneohe and Mililani Mauka 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