zestimate historyAt some point back in time, a few years ago, my house had a specific zestimate value. The historical zestimate graph no longer shows that value at that time. Why would the zestimate change historically?January 26 2012 - Darien00YesReport 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.