- Find a Real Estate Professional
- Realtors®
- Mortgage Lenders
- Home Improvement Pros
- Other Real Estate Services
- Review an Agent, Lender or Pro
- Marketing on Zillow
- Real Estate Agent Advertising
- Join the Professional Directory
- Popular
- Real Estate Market Reports
- More
Answers (1)

- Dunes....
- Contributions:3894
From Zillow..
http://www.zillow.com/blog/research/2011/06/14/upgrading-the-zestimate/
Zillow calls it "upgrading"...and you call it?
You may wish to give this a look..Zillow Announces Zestimate Improvements
"Historical Zestimates"
With the data delivery yesterday, we have re-computed historical Zestimates back to January 2006. There are a few algorithmic developments that we are still working on and, once these are done, we intend to re-compute all Zestimates back to 1996.http://www.zillow.com/blog/research/2011/06/14/upgrading-the-zestimate/
Zillow calls it "upgrading"...and you call it?
You may wish to give this a look..Zillow Announces Zestimate Improvements
Is Zillow lying about their historic estimates on anyone else's homes?
Stating a discriminatory preference in an advertisement for housing is illegal. If you think this content is discriminatory or otherwise inappropriate and feel it should be removed from Zillow, please let us know by completing the information above.
We will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.