“The Zestimate® home valuation is Zillow’s estimated market value, computed using a proprietary formula. It is not an appraisal. It is a starting point in determining a home’s value. The Zestimate is calculated from public and user-submitted data, taking into account special features, location, and market conditions. We encourage buyers, sellers, and homeowners to supplement Zillow’s information by doing other research such as:
•Getting a comparative market analysis (CMA) from a real estate agent
•Getting an appraisal from a professional appraiser
•Visiting the house (whenever possible)”

My Zestimate Is Too High Or Too Low. What Gives?
As mentioned previously, the Zestimate is a starting point in figuring out the true value of a house. The amount of data we have for the house affects the Zestimate accuracy. The state of Missouri is a non-disclosure state, meaning sales prices are not public information. Missouri has a 1-star rating for accuracy of Zestimates.

The ratings are as follows:
Four Stars = Best Zestimate
Three Stars = Good Zestimate
Two Stars = Fair Zestimate
One Star = Tax assessor’s value, or unable to compute
Zestimate accuracy
0 stars = No valuation

What is a Zestimate? Zillow's Home Value Forecast | Zillow

The Zestimate (rhymes with estimate) home valuation is Zillow's estimated market value. Le...

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