How does Zillow come up with a zestimate?I have a house with more upgrades and a green zone at the back whereas my friend down the road has the same exact model and square footage (built two years before mine!) with views of the neighbors and not many upgrades and yet our homes have different price estimates, in that her house seems to have a zestimate higher than mine! How is this possible and how does Zillow come up with these estimates?April 02 2013 - Doctor Phillips00YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.