Accessory Structures in East Honolulu, HI (2026)
5 verified accessory structures rules for East Honolulu, Hawaii, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
East Honolulu (City and County of Honolulu) permits one accessory dwelling unit on residential and country lots of 3,500 square feet or more under the Land Use Ordinance, capping the ADU at 400 square feet on lots up to 4,999 square feet and 800 square feet on lots of 5,000 square feet or more, with one extra off-street parking space and a recorded covenant.
East Honolulu ADU Rules (ROH 21-5.720)
Some RestrictionsCity and County of Honolulu Land Use Ordinance, ROH Ch. 21 (2025 LUO update, Ord. 25-2), Accessory Dwelling Unit standards; orig. Ord. 15-41 (Sept. 14, 2015) Sec. 21-5.720
Covenant for Accessory Dwelling Units: The owner or owners of the lot must record covenants running with the land with the Bureau of Conveyances or the Land Court of the State of Hawaii, or both, as is appropriate. The covenant must be recorded on a form approved by or provided by the Director and may contain such terms as the Director deems necessary to ensure its enforceability. The failure o...
Shed Rules
In East Honolulu (City and County of Honolulu), a one-story detached storage shed accessory to a home is exempt from a building permit when the aggregate floor area of such structures is 120 square feet or less, but the shed must still meet Land Use Ordinance yard and use limits.
East Honolulu Shed Rules (ROH Ch. 18 permit exemption)
Few RestrictionsHonolulu Land Use Ordinance, ROH Sec. 21-4.30 (Added by Ord. 99-12; Am. Ord. 03-37, 10-19, 10-24); building-permit exemption per ROH Ch. 18 (Honolulu Building Code)
Sec. 21-4.30 Yards and street setbacks. (a) No business, merchandising displays, uses, structures or umbrellas, shall be located or carried on within any required yard or street setback except for the following: (1) Public utility poles. (2) Customary yard accessories, such as clotheslines and their supports; unroofed trash enclosures not to exceed six feet in height; and bollards. ... (9) Othe...
Garage Conversions
In East Honolulu (City and County of Honolulu), an existing legally established accessory structure such as a detached garage in a residential or country district may be converted into an accessory dwelling unit, and the Director may waive the floor-area cap or the extra parking space where viable constraints exist; a one- or two-car garage in a required yard may not be converted to a non-garage use.
East Honolulu Garage Conversion to ADU (ROH Ch. 21)
Some RestrictionsHonolulu Land Use Ordinance, ROH Ch. 21, Conversion of Accessory Structures (2025 LUO update, Ord. 25-2); ROH Sec. 21-2.140-1(a) (garage conversion limit)
Conversion of accessory structures. An existing, legally established accessory structure constructed prior to the effective date of this ordinance in the country or residential district may be converted to an accessory dwelling unit and allowed to exceed the maximum floor area established by Section 21-5.720(c)(1) or be exempted from the off-street parking requirement established by Section 21-...
Carport Rules
Carports in East Honolulu are limited to 20 by 20 feet in horizontal dimensions. Hillside carports of Type V-B construction may exceed one story under specified conditions, reflecting Hawaii Kai's sloping terrain.
Carport Dimension and Hillside Rules
Some RestrictionsTiny Homes
East Honolulu does not recognize a separate tiny-home category. Permanent tiny homes on foundations are regulated as ADUs. Movable tiny homes on wheels are generally not permitted as permanent dwellings.
Tiny Home Regulations
Heavy RestrictionsLooking for Honolulu County county-wide rules?
County ordinances apply to unincorporated areas and may supplement East Honolulu city rules.
Accessory Structures in Honolulu County →