How do you determine valueMy next door neighbor and I have identical houses in nearly identical condition. 2 months ago, my house was zillow valued at $377,900 while his was valued at $355,000. Now my house is valued at $358,900 and his is valued at $397,000. First how is this possible and since every motgage broker starts with your site as a starting point for value, what is the reliability and validity of your data?January 21 2012 - Lisle00YesReport 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.