A drastic change in zestimate calculationThe homes that were in $600K range a couple of months ago, are now showing at $500K range. The issue is not in the drop in the price, however the graph does not show that these homes were ever in $600K range in 2010. Instead, the map shifted down, which leads us to conclude that there must have been a major calculation change or an error in Zestimate in the last couple months. It should at least maintain the historical data accurately and show the price drop, if in fact there was $100K drop in the whole neigborhood within a cople of months!Thanks.Concerned home ownerAugust 02 2011 - Chino Hills00YesReport 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.