I recently learned about a data-rich site focusing on real estate: zillow.com Would you like to know about your own house, for instance, would you like to know what it’s worth? Then type your own address into the home page field. You’ll also find lots of information about your neighbors’ homes. Looking for a home? Zillow will help you with that too
Now I know that my house is under-insured. Also that Zillow does not pay attention to the condition or architectural interest of any particular building.