Iowa Building Energy Codes

Code Level

Residential Energy Code

2012 IECC, with amendments (effective 6/1/2014)

Iowa State Energy Code

Commercial Energy Code

2012 IECC (effective 6/1/2014)

Iowa State Energy Code


Authorized by – Legislation & Regulation. The state building commissioner is required to include in the building code provisions that incorporate efficiency. Iowa requires the adoption of a code, based on national model energy codes, for single- and two-family residences.

Adoption of the Iowa State Building Code is voluntary for local jurisdictions, but some provisions like energy are applicable statewide. Jurisdictions are allowed to adopt energy codes that are more stringent than the state code.

Oversight – Code oversight is through the Iowa State Fire Marshal Division, Building Code Bureau.

Code change process – Regulatory. The Building Code Commissioner within the Building Code Bureau initiates the process to upgrade the energy code. Those tentative amendments are approved or rejected by the appointed Building Code Advisory Council.

Code change cycle - Every three years, concurrent with updates to the model energy code.


Enforcement - Building energy code enforcement is part of the duties of local code inspectors for the jurisdiction with authority over the building. If a local jurisdiction has not adopted a code, then plan review can be performed by the state commission.

Implementation/Compliance Studies – The Iowa Department of Public Safety State Building Code Bureau conducted a residential building energy code baseline compliance study in 2011. Click here for a full report.

Primary Contacts

Iowa State Fire Marshal’s Office

Building Code Bureau

Iowa Economic Development Authority

Energy Division

Iowa Association of Building Officials