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Idaho residential energy code
Idaho residential energy code (2018 IECC with Idaho amendments)
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: 2018 IECC with Idaho amendments
- In force since: 2021-01-01
- Adoption: Statewide mandatory code
- Whether the 2024 IECC was adopted in 2026 is unverified; DOE may lag.
- Provisional: a state source was not opened for every point above; DOE energycodes.gov is cited where noted.
Governing body
State of Idaho
Region
ID
Category
code