Building Guides
International Energy Conservation Code (IECC) requirements
As of September 1, 2025, in compliance with House Bill 22-1362, Mesa County will begin enforcing the 2021 International Energy Conservation Code (IECC).
Review the IECC Checklist for Residential Construction (checklist) for residential plan submission and inspection requirements.
For free, up-to-date energy references, energy training, and energy code info, visit the US Department of Energy's Building Energy Codes Program website.
Building guides and guidelines
Building guides are available from the Colorado Chapter of the International Code Council (Colorado ICC). Use the following link and select the guide appropriate for your project.
Specific subdivision foundation requirements
2021 IECC Residential Checklist (PDF)
Commercial Building Remodel, Additions and Alterations Checklist (PDF)
Residential and Commercial Building Guide - Solar (PDF)