Per IRS Instructions for Form 5695:
Use Form 5695 to figure and take your residential energy credits. The residential energy credits are:
Also use Form 5695 to take any residential energy efficient property credit carryforward from 2020 or to carry the unused portion of the credit to 2022.
CAUTION! Only the residential energy efficient property credit (Part I) is available for both existing homes and homes being constructed. The nonbusiness energy property credit (Part II) is only available for existing homes.
The U.S. Code and the instructions for Form 5695 do not clearly state whether home ownership is necessary for the residential energy efficient property credit. However, other IRS publications often refer to homeowners when discussing the credit.
For a list of improvements that qualify for the credits, go to the Energy Star Federal Income Tax Credits and Other Incentives for Energy Efficiency webpage.
Note that any link in the information above is updated each year automatically and will take you to the most recent version of the webpage or document at the time it is accessed.