Information on previous sales of existing properties is typically found in public records available from the county where the property is located. Websites such as Zillow provide quick access to home sales data on a specific street without having to check each property individually on the county records. Typing in the address of one home on a street brings up a map with clickable information on nearby properties.
Detailed information on Zillow includes a section called "Price History," which shows all previous sales, the dates on which the sales were recorded and where the information was obtained. The sources typically include public records and owners. In addition, visitors to Zillow can see statistics from real estate agents on previous and current listings of homes on a street, which provide an idea regarding past and current market value. A "Tax History" section shows the current county valuations for property tax purposes, while a "Neighborhood" section shows the median home prices in a neighborhood and the value of a home per square foot.
Additional online resources for researching home sales on a street include Redfin and Trulia, both of which offer tools similar to those on Zillow, but with variations in how the sites function.