
Priority Energy is a well-known and trusted code compliance testing and consulting company serving the city of Chicago and its surrounding suburbs.
The state of Illinois is transitioning to the IECC 2021 code. As such, the city of Chicago is following a substitute ordinance for commercial and residential property, known as the 2022 Chicago Energy Transformation Code. The villages surrounding Chicago have made the transition to IECC 2021, while others continue to follow IECC 2018, depending on date of permit. Be sure to contact your village office before designing your project.
For guidance on meeting code requirements for a residential or commercial project in your area, give us a call at 312-767-9047.
2022 Chicago Energy Transformation Code – Insulation Requirements

IECC 2021

IECC 2018

IECC 2015
