The 2024 International Energy Conservation Code (IECC), if adopted nationwide, would drive up new construction costs for American households across the U.S. by over $127 billion compared to 2006 levels.
- Currently adopted state energy codes have driven up the cost of new construction by $70 billion since 2006.
- The 2024 IECC, if adopted by all U.S. states, would further drive up new construction costs by $57 billion compared to current state codes.
The U.S. Department of Energy (DOE) evaluates national and state-level impacts associated with building energy codes. Recent updates to the national model energy codes, including the IECC, come at a growing cost to American households. DOE supports consumer-friendly, fuel-neutral and lower-cost building codes with reasonable payback periods—that safeguard affordability and consumer choice.
DOE is currently reviewing the methodology by which it evaluates the cost impacts of building energy codes and how they’re developed – stakeholders are invited to comment on the Department’s Request For Information (RFI) by August 3, 2026.
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