how does zillow get their zestimates
The ZestimateÂ® home valuation is Zillow's estimated market value, computed using a proprietary formula. It is not an appraisal. It is a starting point in determining a home's value. The Zestimate is calculated from public and user-submitted data, taking into account special features, location, and market conditions. Zestimate, on the other hand, is an estimate of the market value of a home, and can change when we have a better algorithm to estimate that value. Note: We never allow future information to influence a historical Zestimate (for example, allowing a sale in 2009 to influence a Zestimate in 2008).