Construction hours in Hawaii County, HI — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
Under the state DOH Community Noise Permit program, construction on the Big Island is generally limited to 7:00 a.m.-6:00 p.m. weekdays and 9:00 a.m.-6:00 p.m. Saturdays, with no work Sundays/holidays and noise capped at 78 dBA at the property line without a permit.
Construction noise is governed statewide by the DOH under HAR 11-46 / HRS 342F rather than a city code, since the County of Hawaii is the only local government. If a project will exceed the maximum permissible sound levels, the contractor must obtain a Community Noise Permit (CNP), submitted at least four weeks before the start date. Under the CNP framework, construction is confined to 7:00 a.m.-6:00 p.m. weekdays and 9:00 a.m.-6:00 p.m. Saturdays, with no Sunday or holiday work, and a 78 dBA ceiling at the property line. Small projects (value under $250,000 and no noise over 78 dBA at the property line) may file a Notification of Intent to Construct instead of a full permit.
Working outside permitted hours or above 78 dBA without a CNP is a HAR 11-46 violation; DOH fines run up to $10,000 per offense, each day a separate offense.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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