HCC §25-6-30
Required utilities for accessory dwelling units
Read the official text at hawaiicounty.gov ↗This section says that any accessory dwelling unit must have a proper sewage disposal system and a water supply. The sewage system must meet state and county rules. The water can come from a public or private system, rain catchment, or a private well, and combinations may be allowed with approval.
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The ordinance, as written (Hawaiʻi County) — General provisions, applicability
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.
The following facilities are required to serve an accessory dwelling unit: (1) Sewage Disposal System. The building site shall be served by a sewage disposal system that meets the requirements of all applicable State and County agencies. (2) Potable Water Supply. The building site shall be served by a public or private water system, rain catchment system, or private well. A combination of water systems may also be allowed when approved by the director after meeting the requirements of the State department of health. (1996, ord 96-160, sec 2; ratified April 6, 1999; am 2024, ord 24-70, sec 10.)25-6-30
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.