How do you calculate "zestimate"?I just looked for my home's using zillow.com and was surprised to see that my home with about the same square footage and even more than most of the properties within the same subdivision has the lowest zestimate.! Not to mention I did lots of renovations (roofing, painting, flooring, landscaping, gate, backyard deck, kitchen). It's affecting the valuation when I apply for refinancing so it matters a lot to me.Please let me know and let's talk about it. Location: 289 Jacaranda Drive, Hayward, CA 94544 February 12 2012 - Whitman-Mocine00YesReport 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.