The degree of energy efficiency (or deficiency) can play a significant role in the selling price you can get for your home.
In the area of buyer financing, for example, lenders are looking closely at the projected utility costs for a home in determining whether a prospective borrower can afford both the monthly

mortgage payment AND the utility payment.
Similarly, FHLMC has eased its guidelines to permit higher loan-to-income ratios for energy efficient properties.

The rising cost of energy is affecting the residential real estate market in other ways. In recent national studies, 83% of homeowners surveyed believe that energy-saving features added to the resale value of a property. How much? Sixty-six percent of real estate brokers surveyed that a well-insulated home is worth more (an average of 9%). It pays to make your home energy efficient — in more ways than one.