Structure Height Limits: Pearl City vs Waipahu
How do structure height limits rules compare between Pearl City, HI and Waipahu, HI?
Pearl City and Waipahu have similar restriction levels.
Pearl City, HI
Honolulu County
Pearl City structure heights follow ROH 21-4.60 with residential envelope planes in 21-3.70-1, typically 25 feet in R-5 districts covering Waiau, Manana, and the core Pearl City CDP.
View full Pearl City rules →Waipahu, HI
Honolulu County
Waipahu structure heights follow ROH 21-4.60 with envelope planes in 21-3.70-1, typically 25 feet in R-5 districts and higher caps in A-1 and A-2 districts near Waipahu Town Center.
View full Waipahu rules →Key Facts Comparison
| Fact | Pearl City | Waipahu |
|---|---|---|
| R-5 height | 25 feet typical | 25 feet typical |
| R-7.5/R-10 | 30-foot envelope | - |
| Code section | ROH 21-4.60 | ROH 21-4.60 |
| Airspace overlay | FAA Part 77 | - |
| A-1 / A-2 | - | Higher caps |
| District companion | - | ROH 21-3.70-1 |
Highlighted rows indicate differences between cities.
Pearl City FAQ
How tall can a Pearl City home be?
Most Pearl City residential districts cap structure height at 25 feet in R-5 and 30 feet in R-7.5 and R-10 under ROH 21-4.60 and 21-3.70-1 envelope planes. FAA limits may apply near flight paths.
Does proximity to Pearl Harbor affect height?
Yes. FAA Part 77 imaginary surfaces may restrict absolute building height near the Joint Base approach corridors. Homes in some Pearl City areas must review both ROH and FAA limits before adding stories.
Waipahu FAQ
How tall can a Waipahu home be?
Most Waipahu R-5 lots cap structure height at 25 feet under ROH 21-4.60 and 21-3.70-1 envelope planes. Apartment districts near Waipahu Town allow substantially taller buildings for multi-family use.
Can I add a third story to a plantation home?
Usually no without a variance. Adding a full third story typically exceeds the 25-foot R-5 envelope plane under ROH 21-4.60 and 21-3.70-1. Partial second-story additions are easier to permit.
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