Swimming Pools & Spas in Honolulu County, HI (2026)

5 county-level rules, plus city-specific rules for 11 cities in Honolulu County, Hawaii.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Honolulu County. If you live within an incorporated city, that city's own rules apply — see the city list below.

Pool Permits

Any residential swimming pool construction, installation, or substantial modification on Oahu requires a building permit from the Department of Planning and Permitting, with fees set under Chapter 18.

Building permit required for residential pools

Some Restrictions

Full ordinance details →Official source ↗

Fencing Requirements

Residential pools must be enclosed by a fence, wall, or approved barrier with self-closing, self-latching gates to prevent unsupervised access, consistent with Hawaii Revised Statutes 46-73.

Pool fence, gate, and barrier standards

Heavy Restrictions

Full ordinance details →Official source ↗

Safety Rules

Oahu's Residential Swimming Pools article sets combined barrier, construction, and modification rules designed to prevent drownings, supplementing the state building and residential codes.

Residential swimming pool safety requirements

Heavy Restrictions

Full ordinance details →Official source ↗

Above-Ground Pools

Oahu regulates above-ground and in-ground residential pools identically under Chapter 16, Article 6, with the same barrier, permit, and inspection requirements once capacity thresholds are met.

Above-ground pool rules on Oahu

Some Restrictions

Full ordinance details →Official source ↗

Hot Tub Rules

Oahu regulates hot tubs and spas under the residential swimming pool article, requiring barriers, permits, and code-compliant plumbing and electrical work once statutory thresholds are met.