Solar Energy in Honolulu County, HI (2026)
2 rules for unincorporated 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.
Panel Permits
Honolulu requires new homes to be built solar-ready, with an electrical panel sized to accommodate a future rooftop photovoltaic system.
Honolulu Solar-Ready Panel Requirement
Some RestrictionsROH § 16-1.2, Residential Code § R408.1
New single-family detached dwellings, two-family detached dwellings, and duplexes shall install for each residence an electrical panel with reserved space to accommodate not less than a five Kilowatt (AC) photovoltaic system. New multifamily dwellings shall install an electrical panel that includes space reserved to accommodate a photovoltaic system: (1) sized to serve common area electrical lo...
Expedited Solar Permitting
Honolulu must approve or deny rooftop solar permit applications within 14 calendar days, or 28 days for projects over $50,000.
Honolulu Expedited Solar Permit Review
Light RestrictionsROH § 18-5.10(b)(1)
Establish an internet-based permitting process by which all permits required for the operation of a clean energy project are approved or denied within 14 calendar days after the submission of a complete application; provided that approval or denial of permit applications must be made within seven calendar days after submittal of required corrections; subject to the following exceptions and requ...
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