Amends the Internal Revenue Code to allow a 30% energy tax credit for qualified energy efficiency property. Defines "qualified energy efficiency property" as property which: (1) is residential rental property, nonresidential real property, or mixed use real property; (2) is a qualified building as defined by this Act; and (3) achieves a specified energy savings.
Amends the American Recovery and Reinvestment Act to allow grants for investment in qualified energy efficiency property in lieu of tax credits.