How Much are New Windows. If your house is an older structure you may be believing about ways to upgrade and update it. Maybeyour home is costly and cold to heat. You might find that your windows allow air or potentially even water. Each one of these problems can be resolved by changing the windows in your house. Doing this can help with the insulation in your home which, in turn, will certainly help to lower your energy bills in addition to increasing the value of your home however how much are new windows?