ADU rules in Ewa Gentry, HI — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Ewa Gentry homeowners may build one accessory dwelling unit per zoning lot in eligible residential districts, subject to Honolulu LUO size, parking, occupancy, and rental duration rules under ROH Sec. 21-5.720.
Accessory dwelling units in Ewa Gentry are governed by the Honolulu Land Use Ordinance (ROH Chapter 21). One ADU is permitted per zoning lot in Country, R-3.5, R-5, R-7.5, R-10, and R-20 districts, including many Ewa Plain master-planned lots. ADUs must meet minimum lot size, off-street parking, and owner-occupancy rules. Short-term rentals under 30 days are prohibited in ADUs. The ordinance, amended by Ordinance 25-2 in 2025, also provides after-the-fact permit pathways for unpermitted units constructed before September 14, 2015. Private HOA covenants that apply to many Ewa Gentry subdivisions may impose stricter limits on top of the city rules.
Building without permits, renting an ADU for under 30 days, or exceeding size limits can trigger notices of violation and daily fines from DPP.
Ewa Gentry, HI
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Ewa Gentry, HI
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Ewa Gentry, HI
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Ewa Gentry, HI
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Ewa Gentry, HI
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Ewa Gentry, HI
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Side-by-side rule comparisons with other cities in Honolulu County.
See how other cities in Honolulu County handle adu rules.
See how Ewa Gentry's adu rules rules stack up against other locations.
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