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.