You will need to know only the cost of the insulation because only that would be a home energy efficient cost allowed.
Building envelope components
To qualify, building envelope components must have an expected lifespan of at least 5 years. Qualified components include new:
- Exterior doors that meet applicable Energy Star requirements. Credit is limited to $250 per door and $500 total.
- Exterior windows and skylights that meet Energy Star Most Efficient certification requirements. Credit is limited to $600 total.
- Insulation and air sealing materials or systems that meet International Energy Conservation Code (IECC) standards in effect as of the beginning of the calendar year that is 2 years prior to the calendar year in which such component is placed in service.
- For example, materials or systems installed in 2025 must meet the IECC standard in effect on Jan. 1, 2023. These items don't have a specific credit limit, other than the maximum credit limit of $1,200. Insulation and air sealing materials or systems are they only types of qualifying property that do not have to meet the qualified manufacturer and PIN requirements.
Labor costs for installing building envelope components don't qualify for the credit.
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