Iowa residential energy code

Iowa residential energy code (2012 IECC with Iowa amendments (481 IAC 301.24))

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: 2012 IECC with Iowa amendments (481 IAC 301.24)
In force since: 2014-03-12 (carried forward by the 2025-09-10 consolidation)
Adoption: Statewide mandatory code
The rule moved from 661 IAC 303.2 to 481 IAC 301.24; the department did not update to the 2024 edition.
DOE lists an effective date of 2014-04-01.
Provisional: a state source was not opened for every point above; DOE energycodes.gov is cited where noted.

Governing body

State of Iowa

Region

Applies to

General contracting HVAC Insulation Electrical Windows & doors

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