Building Energy Code
Quick Summary
Iowa's building energy code requires new commercial and residential buildings to meet energy efficiency standards based on the 2012 International Energy Conservation Code (IECC), effective since 2014. This means new homes and buildings you purchase or construct will have better insulation, HVAC efficiency, and other energy-saving features built in, though additions and renovations to existing homes are currently exempt. These code requirements are enforced through local building permits and inspections.
AI-generated summary • Updated 7/12/2026
Program Details
- Program ID
- 1890
- Last Updated
- 6/18/2023
Eligibility
Program Summary
Much of the information presented in this summary is drawn from the U.S. Department of Energy’s (DOE) Building Energy Codes Program and the Building Codes Assistance Project (BCAP). For more detailed information about building energy codes, visit the DOE and BCAP websites. In 2006 Iowa enacted H.F. 2361, requiring the State Building Commissioner to adopt energy conservation requirements based on a nationally recognized building energy code. The State Building Code Commissioner, in conjunction with the State's Building Code Advisory Council, adopts rules and holds public hearings on the proposed rules. Effective June 1, 2014, the 2012 International Energy Conservation Code (IECC) was adopted as the code for commercial and residential buildings with some amendments. Residential additions and renovations are exempt from the 2012 IECC.
Contact & Resources
Please verify current program details with the administering agency before making any financial decisions.