Hawaii residential energy code

Hawaii residential energy code (State energy conservation code; counties adopt and enforce (IECC edition not confirmed))

As of 2026-10-22. DOE's Building Energy Codes Program (energycodes.gov) lags state adoption, so where a state's own rule was read it governs and DOE's differing figure is noted. Residential means one- and two-family dwellings and townhouses. Local amendments can apply; check the code body before relying on a section.

Key features

Code in force: State energy conservation code; counties adopt and enforce (IECC edition not confirmed)
Adoption: Statewide code, enforced by local governments
DOE lists the 2018 IECC (2020-12-15); a state council notice (snippet) reports 2021 IECC amendments adopted 2022-12-15 with a county deadline of 2024-12-15. Unresolved.
Provisional: a state source was not opened for every point above; DOE energycodes.gov is cited where noted.

Governing body

State of Hawaii

Region

Applies to

General contracting HVAC Insulation Electrical Windows & doors

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