News Release Date
01-16-2026
ILLINOIS AMENDED IECC
On October 30, 2025, the Capital Development Board updated their website announcing this effective date. While the energy code amendments have been published, the complete version is not yet available on the ICC website.
Ongoing developments: You have additional time to revise plans as needed. Please note that this is a state-level regulation local PUDs or development agreements cannot supersede the state's energy code requirements.