Honolulu, HI Swimming Pools & Spas: Above-Ground Pools (2026)

Oahu does not have a separate above-ground pool ordinance; instead, Revised Ordinances of Honolulu (ROH) Chapter 16 (Building Code) adopts the Hawaii State Building Code and Hawaii State Residential Code, which include Section 3109 (Swimming Pools, Spas and Hot Tubs) and IRC Appendix G. These provisions classify any residential 'swimming pool' as any structure intended for swimming or recreational bathing that contains water more than 24 inches deep, expressly including above-ground and on-ground pools. For installation, the homeowner or licensed contractor must apply for a building permit through the Department of Planning and Permitting (DPP) before assembling any above-ground pool that meets the 24-inch threshold; DPP's Building Permit Requirements page lists pools as 'plan-required' work that cannot proceed under the small-project exemption. Permit submittals must include a site plan with setbacks (typically 5 feet from side and rear property lines under LUO Chapter 21 yard standards), the pool manufacturer's data sheet, and a barrier plan. Because Oahu is in Seismic Design Categories C-D and a hurricane-prone region, larger above-ground pools also require structural details showing how the pool wall and any deck attached to it resist seismic and uplift loads under ROH Chapter 16 Appendix W. Once installed, the barrier rules in Hawaii Building Code §3109.4 apply: the pool must be enclosed by a barrier at least 48 inches tall measured from the outside of the barrier; the vertical gap between grade and the bottom of the barrier cannot exceed 2 inches; and openings cannot pass a 4-inch-diameter sphere. The above-ground pool's own wall may serve as the barrier when its outer wall is at least 48 inches above the surrounding grade, in which case the gap between the top of the pool wall and the bottom of any deck-mounted barrier cannot exceed 4 inches. Ladders and stairs that provide access to the pool must either be removable, lockable, or surrounded by their own compliant barrier, and any opening created by removing the ladder cannot pass a 4-inch sphere. Gates serving the pool barrier must be self-closing and self-latching, with the latch no lower than 54 inches above grade or otherwise shielded from a child's reach. ASTM F1346 power safety covers can substitute for a barrier on the top of an above-ground pool only when the pool is not in use. Suction-entrapment protection under the federal Virginia Graeme Baker Pool and Spa Safety Act (VGBA) is enforced through the same residential code adoption. Public, semi-public, and rental-use pools (including STRs and condo pools) face stricter enforcement under Hawaii Administrative Rules Title 11, Chapter 10 (Public Swimming Pools), administered by the Hawaii Department of Health, but a single-family above-ground pool used only by the household and guests is regulated solely under ROH Chapter 16. After installation, a final inspection by DPP confirms barrier compliance before the pool may be filled, and resale of the property triggers a re-disclosure of any post-1985 pool barrier installed under these standards.