HCC §25-6-36

How many accessory dwelling units are allowed per property

Read the official text at hawaiicounty.gov ↗

This rule limits how many accessory dwelling units (ADUs) you can build on one property. Usually, you can have up to three ADUs per building site. If your property is allowed to have more than one main house, then you can have one ADU for each main house allowed by zoning rules.

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The ordinance, as written (Hawaiʻi County) — Density limit

A copy, taken August 21, 2026. The version published by Hawaiʻi County is the one that governs, and it may have changed since. Check it before relying on anything here.

Accessory dwelling units shall be restricted to a maximum of three per building site, except, where a building site is permitted to have more than one primary dwelling, one accessory dwelling unit shall be allowed for each primary dwelling authorized by the applicable zoning regulations. (1996, ord 96-160, sec 2; ratified April 6, 1999; am 2024, ord 24-70, sec 10.)25-6-36

Read the official text at hawaiicounty.gov ↗as published Jul 16, 2026our copy taken Aug 21, 2026

Published by the County of Hawaiʻi Office of the County Clerk.

LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.