How does Zillow get their information on a house? Last year when I looked up my house it has 6000 sqft with 5 bedrooms. Then, a few months later it increased to 6300 sqft. Just now, it went up again to 6500 sqft with six bedrooms. My house doesn't grow itself! Does Zillow just set the house on a growth compounding model like what banks do with their interest?!!November 25 2012 - Portland00YesReport 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.