Zillow zestimate has been a controversial tool that provides varying levels of accuracy as to property values throughout the nation. Luckily, you can find out the accuracy in your state or county. By going to http://www.zillow.com/zestimate/#acc you can see charts put out by Zillow as to the accuracy of their zestimate tool.
For Pinellas County, Florida, 48.8% of houses sell for more than a 10% difference from the zestimate for the property. This could be a sale for more than ..