How do you come up with your home price estimate.I see my home has gone down in price and other homes around me have risen in price. My home is larger, etc. What happened to change this all of a sudden?August 20 2011 - South Beaverton00YesReport 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.