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Institute for Market Transformation

Promoting energy efficiency in buildings
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Existing Buildings

The median age of commercial buildings in the United States is 32 years, and half of all commercial buildings were constructed before 1980. Making up the majority of our built environment, these older buildings have vast potential to save money, energy, and water through efficiency upgrades.

Every building undergoing renovation is likely to trigger mandatory energy conservation measures under the International Energy Conservation Code (IECC) and ASHRAE Standard 90.1. However, these measures are often overlooked because of low awareness about how energy codes apply to building renovations.

IMT is working to bridge this gap by producing brochures, case studies, and other resources, and providing technical assistance to explain how the IECC applies to additions and alterations. IMT also works in collaboration with our national and regional partners to develop sensible code change proposals to improve the understanding of the IECC’s application to work on existing buildings.

Energy-efficient additions & renovations: Do yours meet code?

Energy-efficient additions & renovations: Do yours meet code?

See our brochures with advice on how to make sure that a renovation or addition is IECC compliant:


Commercial brochure

Residential brochure


Visit our Resources library to view more brochures, on HVAC, insulation, and lighting requirements.

The brochures have been reviewed and approved by the International Code Council.