SECTION 2. BACKGROUND
Internal Revenue Bulletin 2006-11 · 2026-10-03 edition · updated 2026-10-04 · United States
.01 In General. Section 45L provides a credit to an eligible contractor who constructs a qualified new energy efficient
home. For qualified new energy efficient homes that are manufactured homes, the amount of the credit is $1,000 or $2,000, depending on the energy savings that are achieved. A manufactured home qualifies for the credit if:
(1) It is located in the United States; (2) Its construction is substantially completed after August 8, 2005;
(3) It meets the energy saving requirements of § 45L(c)(2) or (3); and
(4) It is acquired, directly or indirectly, from the eligible contractor after December 31, 2005, and before January 1, 2008, for use as a residence.
.02 Energy Saving Requirements. To meet the energy saving requirements of § 45L(c)(2) or (3), a manufactured home must meet one of the following standards:
(1) To meet the energy saving requirements of § 45L(c)(2) and qualify for the $2,000 credit, a manufactured home must be certified to provide a level of heating and cooling energy consumption that is at least 50 percent below that of a comparable manufactured home constructed in accordance with the standards of section 404 of the 2004 Supplement to the 2003 International Energy Conservation Code (2004 IECC Supplement), and to have building envelope component improvements that provide for a level of heating and cooling energy consumption that is at least 10 percent below that of a comparable dwelling unit (see section 3 of this notice); or
(2) To meet the energy saving requirements of § 45L(c)(3) and qualify for the $1,000 credit, a manufactured home must either—
(a) be certified to provide a level of heating and cooling energy consumption that is at least 30 percent below that of a comparable manufactured home constructed in accordance with the standards of section 404 of the 2004 IECC Supplement, and to have building envelope component improvements that provide for a level of heating and cooling energy consumption that is at least 10 percent below that of a comparable dwelling unit; or
(b) meet the current requirements established by the Administrator of the Environmental Protection Agency under the ENERGY STAR ® Labeled Homes Program in effect on the date construction is substantially completed (See section 4 of this notice).
.03 For purposes of section 2.02 of this notice, heating and cooling energy and cost savings must be calculated in accordance with the procedures prescribed in Residential Energy Services Network (RESNET) Publication No. 05–001 (Nov. 17, 2005).
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