All Estimated Values rely on the accuracy, comprehensiveness, and timeliness of the data they use and so their accuracy will vary depending on a wide range of factors. The most significant factor is the number of recent home sales in the area and how similar the property is to surrounding area properties. Generally, all Estimated Values tend to be less accurate in rural areas where sales are fewer. Estimated Values are also less accurate when estimating the value of properties that are unusual, much larger than average, or have particular distinctive features.