Structure Height Limits: Honolulu vs Waipahu
How do structure height limits rules compare between Honolulu, HI and Waipahu, HI?
Waipahu has fewer restrictions than Honolulu.
Honolulu, HI
Honolulu County
Honolulu County's LUO Section 21-4.60 sets maximum structure heights and building envelope plane rules, with residential districts capped at 25 to 30 feet under ROH 21-3.70-1.
View full Honolulu 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 | Honolulu | Waipahu |
|---|---|---|
| Typical residential max | 25 feet | - |
| Envelope plane | 30 feet | - |
| Primary section | ROH 21-4.60 | - |
| Residential companion | ROH 21-3.70-1 | - |
| R-5 height | - | 25 feet typical |
| A-1 / A-2 | - | Higher caps |
| Code section | - | ROH 21-4.60 |
| District companion | - | ROH 21-3.70-1 |
Highlighted rows indicate differences between cities.
Honolulu FAQ
How tall can I build a house in Honolulu County?
Most residential zoning districts cap structures at 25 feet under ROH 21-4.60 with a 30-foot envelope plane rising from the side yards. Apartment and business districts allow greater heights.
What is the building envelope plane?
A sloped imaginary plane rising from the side-yard property lines that limits how close tall portions of a structure can be to neighbors. ROH 21-4.60 uses a 30-foot envelope in most residential districts.
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.
Compare other topics
See how Honolulu and Waipahu 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