This bill amends the Internal Revenue Code, with respect to the deduction for energy efficient commercial buildings, to: (1) make the deduction permanent, (2) permit 501(c)(3) tax-exempt organizations and Indian tribal governments to allocate the deduction to the person primarily responsible for designing the property in lieu of the owner of the property, (3) allow partnerships and S corporations to receive the full benefit of a deduction allocated at the partner or shareholder level, and (4) exempt property placed in service in a qualified low-income building from the requirement to reduce the basis of the property by the amount of the deduction.