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International Energy Conservation Code (IECC) requirements

As of January 1, 2023, in compliance with House Bill 22-1362, Mesa County will begin enforcing the 2018 International Energy Conservation Code (IECC).

Review the IECC Checklist for Residential Construction (checklist) for residential plan submission and inspection requirements.

For commercial projects, review the IECC Commercial Checklist.

For free, up-to-date energy references, energy training, and energy code info, visit

Building guides and guidelines

The Building Guides are in Adobe Acrobat PDF format. You can download the Acrobat Reader from Adobe for free and is easily set up to work with most Web browsers. ***For fillable forms please download and save or open in Microsoft Edge. These Building Guides are courtesy of the Colorado Chapter of the International Conference of Building Officials.