You would first need a home energy audit. That means a professionally certified building analyst comes into your home to perform tests and figure out what needs to be done. This could typically cost about $250. Depending on what needs to be done to your home and how big your home is, efficiency renovations could cost anywhere from several hundred dollars to several thousand dollars. To give you some more perspective, many people who do home retrofitting often see energy savings of about $900 a year.
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