Reasons for sudden value drop?My property's value hs been dropping steadily over the last several months. In fact, it's now dropped below my neighbor's when it's always been higher. How is this possible when they've done no improvements or additions? Does Zillow calculate it's estimated market value ranges based on recent assessed values by the town? Thank you in advance for your response.June 30 2011 - Town of Andover00YesReport 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.