The 2021 IECC in Colorado

One Code with Many Different Adoptions

One of the challenges of building in a “home rule” state is that each independent jurisdiction has the authority to amend any portion of the ICC building code to meet its goals

One Code with Many Different Adoptions
Published June 22, 2023

Know Your Jurisdiction's Modifications

Many jurisdictions have completed the transition to the 2021 IECC (International Energy Conversation Code), and many more will have it implemented by the end of this year.  EnergyLogic has engaged with our builder clients and offered public training and information on the changes and challenges of the 2021 IECC. However, we all need to be aware of amendments and modifications to the base code that each jurisdiction may include. 

Some Changes Bring More Restrictive Codes

Even with the performance increases in the 2021 code, some Colorado jurisdictions require even greater performance.  Many choose this path due to climate/carbon goals and the transition to electric energy.   

For example: 

  • Erie requires performance path projects with gas to model 20% better than the 2021 code. Three additional energy efficiency measures are necessary if a prescriptive path is chosen. 
  • Louisville adopted the RC amendment, which requires houses to achieve a HERS/ERI of 50 before and 0 after renewables. 
  • Denver requires performance path projects with gas to model 18% better than the 2021 code and prescriptive path projects to meet a points-based quota. 
  • Fort Collins has adopted a compact water distribution policy.   
  • Colorado Springs replaced the 2021 prescriptive table with the 2018 prescriptive table and then adopted the core requirements of the 2021 code.  
  • Loveland eliminated the prescriptive path option.

Making Sense of It All

Like much of life, this stuff is complicatedIt is more important than ever to work with an experienced rating company that is tracking these changes and guiding builder clients to compliance and success in planning and buildingEnergyLogic works diligently to stay abreast of what is required and guide our existing and potential clients to success.

About the Author
Rusty Buick

Rusty Buick

Rusty Buick is EnergyLogic's Director of Business Development. As a former general contractor specializing in high-performing homes, Rusty loves helping builders appreciate the value of building high-performing, energy-efficient homes for their clients and for future generations. Learn more about Rusty!

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