ADU Rules: Pearl City vs Urban Honolulu
How do adu rules rules compare between Pearl City, HI and Urban Honolulu, HI?
Pearl City and Urban Honolulu have similar restriction levels.
Pearl City, HI
Honolulu County
Pearl City homeowners, including military families near Pearl Harbor, may build one accessory dwelling unit per zoning lot in eligible residential districts, subject to parking, occupancy, and rental-duration limits.
View full Pearl City rules →Urban Honolulu, HI
Honolulu County
Most Urban Honolulu lots sit in apartment or mixed-use zones where ADUs under ROH Sec. 21-5.720 are not permitted; ADUs are generally limited to R-5 through R-20 single-family neighborhoods like Manoa, Kaimuki, and Nuuanu.
View full Urban Honolulu rules →Key Facts Comparison
| Fact | Pearl City | Urban Honolulu |
|---|---|---|
| - | - | |
| Code Section | - | ROH Sec. 21-5.720 |
| Urban Eligible Zones | - | R-5, R-7.5, R-10, R-20 |
| Not Eligible | - | A-1, A-2, BMX, B |
| Minimum Rental Term | - | 30 days |
Highlighted rows indicate differences between cities.
Pearl City FAQ
Can a military family add an ADU for visiting relatives?
Yes, if the property is in an eligible residential district and meets ADU standards. Long-term rental is allowed, but short-term rental under 30 days is not.
Does the ADU need its own parking stall?
Yes, ADUs typically require an additional off-street parking space under Sec. 21-5.720. Verify the specific requirement with DPP before applying.
Urban Honolulu FAQ
Can I build an ADU on my Kakaako or Ala Moana condo lot?
No. ADUs are not allowed in A-1, A-2, or BMX mixed-use zones common in Kakaako and Ala Moana. ADUs are limited to residential R-5 through R-20 districts.
Can I build an ADU on my Manoa single-family lot?
Yes, if the lot meets R-5 or R-7.5 minimum size, parking, and setback rules under ROH Sec. 21-5.720 and you obtain a building permit.
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