Any home that meets all the requirements of the ENERGY STAR Certified Homes program can earn the label. However, the program requires builders and home energy raters to perform quality assurance inspections throughout the building process, so generally only new homes can meet these requirements. Existing homes typically cannot meet all of these requirements without extensive renovations such as removing and replacing drywall, exterior cladding, roofing, and heating and cooling systems.
However, the energy efficiency of existing homes can often be greatly improved using cost-effective retrofit techniques. Visit ENERGY STAR Home Improvement to learn how.