Before You Build in Ewa Gentry, HI: Permit & Rule Checklist (2026)

ROH Sec. 18-3.1 lists when Ewa Gentry property owners need a Honolulu building permit for fence or wall construction, with a narrow exemption for short retaining and riprap walls not exceeding 30 inches.

ROH Sec. 21-4.40 controls retaining walls in Ewa Gentry, limiting fill-containing walls inside required yards to six feet and combining terraced wall heights for measurement.

Ewa Gentry residents follow ROH Sec. 21-4.60, which caps fences in front yards and imposes landscaping or setback requirements once a fence, wall, or hedge exceeds 36 inches in height.

ROH Sec. 21-4.30 governs what Ewa Gentry neighbors can place in required yards along shared property lines, since Hawaii has no dedicated city spite-fence statute and relies on yard and height provisions.

ROH Sec. 16-6.2 requires Ewa Gentry residential swimming pools to be fully enclosed by a compliant fence or protective device designed to prevent unsupervised access by young children.

Hot tubs and spas in Ewa Gentry are regulated under the residential pool article with barrier rules triggered by depth and capacity, plus electrical and plumbing permit requirements.

ROH Chapter 16, Article 6 establishes safety requirements for residential pools in Ewa Gentry, covering construction, modifications, and ongoing safety devices for all in-ground and above-ground pools.

Ewa Gentry homeowners installing or modifying a residential swimming pool must obtain a building permit under ROH Chapter 18, with electrical and plumbing inspections coordinated through Honolulu DPP.

Residential pools in Ewa Gentry must be surrounded by a compliant barrier with self-closing, self-latching gates under ROH Section 16-6.2 to prevent unsupervised child access.

Ewa Gentry residents installing an above-ground pool must follow the same Chapter 16 Article 6 rules as in-ground pools, including barrier and safety requirements once depth thresholds are met.

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.

A garage conversion in Ewa Gentry is generally treated as creating an accessory dwelling unit under ROH Sec. 21-5.720 and requires a building permit plus replacement parking on the lot.

Backyard sheds in Ewa Gentry must meet Honolulu LUO yard and setback requirements under ROH Sec. 21-4.30, with height limits in Sec. 21-4.60. Small sheds under the ROH Chapter 18 threshold may not need a building permit.

Honolulu has no dedicated tiny-home ordinance; permanent tiny homes in Ewa Gentry are regulated as accessory dwelling units under ROH Sec. 21-5.720, and tiny homes on wheels are not allowed as permanent dwellings.

Carports and garages in Ewa Gentry are limited to 20 ft by 20 ft in horizontal dimensions under ROH Sec. 21-2.140-1, with height and setback standards from Sec. 21-4.30 and 21-4.60 also applying.

Ewa Gentry residents using backyard fire pits must follow Honolulu Fire Code open burning provisions, which require property owner permission and advance written notice to the Fire Department before any recreational or ceremonial fire.

Outdoor burning in Ewa Gentry is tightly regulated through Honolulu's Fire Code adoption of NFPA 1, and most backyard trash or yard-waste burning is effectively prohibited without permits.

Ewa Gentry residents need an Urban Forestry permit before trimming street trees along Fort Weaver Road, Kolowaka Drive, and Gentry village streets under ROH Sec. 10-1.4.

Ewa Gentry irrigation is subject to ROH Chapter 30 water management and Board of Water Supply shortage stages that can restrict days and hours of outdoor watering.

Removing a designated exceptional tree on an Ewa Gentry lot requires a Parks and Recreation permit under ROH Chapter 40, Article 8.