The HERS Index has become so much a part of the Greater Phoenix housing market that existing home owners are retrofitting their homes to improve their home’s HERS Index Score. As part of preparing to be put up for sale, a 1960 ranch style home in South Scottsdale was retrofitted and rated. The home was originally was rated at a HERS Index Score of 160 and after the retrofit achieved a HERS Index Score of 66. With the new score the home is now competitive to a newly constructed home in the Phoenix market. For more information click on http://activerain.trulia.com/blogsview/4397191/advanced-level-remodel-certified-by-scottsdale-green-building-program This is a clear indication that the HERS Index can be an important tool in the existing homes market.