Before You Build in East Honolulu, HI: Permit & Rule Checklist (2026)

The City and County of Honolulu Department of Planning and Permitting requires a building permit for any fence greater than 6 feet in height and any wall greater than 30 inches in height, under ROH Chapter 18. Fences at or below 6 feet and walls at or below 30 inches are exempt from the building permit requirement.

East Honolulu neighbor fence disputes fall under ROH 21-4.30 yard setbacks combined with 21-4.60 height limits, since Hawaii has no dedicated spite fence statute for Hawaii Kai or Aina Haina lots.

East Honolulu pool owners in Hawaii Kai, Portlock, and Aina Haina must install code-compliant barriers under ROH Sec. 16-6.2, with public pools in the CDP subject to companion rules at 16-7.9.

In East Honolulu, which is governed by the City and County of Honolulu Land Use Ordinance, walls and fences (other than retaining walls) up to 6 feet may enclose or project into any required yard. Public-utility fences may reach 8 feet (9 feet with security wire), and fences on agriculturally dedicated land may reach 10 feet.

In East Honolulu, retaining walls containing fill within a required yard may not exceed six feet, measured from the lower of existing or finish grade to the top of the wall. Walls protecting a cut have no height limit, and safety railings or fences on top of a retaining wall are limited so the combined height stays within prescribed limits.

Article 6 of Chapter 16 sets the full residential pool safety program for East Honolulu, covering purpose, barriers, new-construction standards, modifications, limited exceptions, and civil penalties for noncompliance.

East Honolulu does not have a separate ordinance for above-ground pools; they are governed by the residential pool article and the adopted Hawaii State Residential Code, with barrier rules applying once depth thresholds are met.

Hot tubs and spas in East Honolulu are regulated as residential pools under Chapter 16 Article 6, with barrier rules triggered once depth or capacity meet thresholds from the adopted state residential code.

East Honolulu is governed by the City and County of Honolulu, whose Building Code (ROH Chapter 16, Article 6) requires every residential swimming pool to be enclosed by a barrier meeting International Building Code Sections 3109.4 and 3109.5. The barrier must be at least 48 inches high, have no more than a 2-inch gap at the bottom, openings no larger than a 4-inch sphere, and self-closing, self-latching gates.

In East Honolulu a building permit is required before constructing a residential swimming pool, spa, or hot tub. The City and County of Honolulu Building Code (ROH Sec. 16, Section 105) requires a permit for all work covered by the code as provided in ROH Chapter 18, and the Department of Planning and Permitting reviews pool plans for compliance with the barrier and structural standards.

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.

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.

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.

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.

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 follows the City and County of Honolulu Fire Code: recreational, decorative, or ceremonial open fires (including backyard fire pits and bonfires) require the property owner's written permission plus a letter submitted to the fire department at least 14 days before the event.

All open burning in East Honolulu must comply with the Honolulu Fire Code: most categories require a letter to the fire department 14 days in advance and a 15-minute pre-light notice, and burning may be prohibited entirely when deemed a hazard.

East Honolulu homeowners along Kalanianaole Highway and residential streets must follow ROH Sec. 10-1.4 permit rules for trimming or pruning street trees in the public right-of-way.

East Honolulu's large lots from Portlock to Kalama Valley must follow ROH Chapter 30 water management provisions plus Honolulu Board of Water Supply conservation stages during shortages.

Designated exceptional trees in East Honolulu, including mature specimens in Aina Haina and Niu Valley estates, cannot be removed without a Parks and Recreation permit under ROH Chapter 40, Article 8.