Gainesville Green is a web site that will tell you about a specific address's energy usage. Works for apartment complexes too! "Remember, energy consumption shows how much energy a house and the people in it are using. The numbers can't tell you why a home or family uses more energy, only that the home and its occupants use more or less total energy than others. More people and smaller homes can have a dramatic impact on total energy use numbers, and we encourage you to keep that in mind while browsing Gainesville Green."