The cost of a window replacement depends on the type of material being used for the project and the type, size and shape of the window or door. Wood and vinyl are the two most popular types of materials used for replacement windows, but other common materials include fiberglass, aluminum-composite and plastic. Glass, vinyl and aluminum are cost-effective choices for storm doors and sliding doors, but sometimes are not the best for an entry door. Some window replacements cost as much as $25,000, and some cost as little as $2,000. We can provide you with an estimate based on different options available.