Although the costs used in the Remodeling Cost vs. Value Report are based on itemized estimates (see Methodology and Confidence Levels), the designs and material specifications are “typical” and not based on actual projects. When comparing the data in this report to actual remodeling costs in a particular geographic area, small differences in the size or scope of a project, or in the quality of finishes and accessories the homeowner chooses, can dramatically affect the price. The distinction that the Cost vs. Value Report makes between “midrange” and “upscale” projects provides a range of pricing, but it doesn't take into account extreme variations in pricing that many markets—or neighborhoods within markets—may experience from time to time.