Real Estate Website Zillow Sued Over Price Estimates, Offers Reward

The real estate website Zillow is being sued by a family that owns a Schaumburg-based homebuilding business over the site’s listing of Zestimates, or home value estimates.

In the class action lawsuit filed May 19 in Cook County Court, the Patel family, owners of, argue that Zestimates are inaccurate and illegal under Illinois law because they’re not licensed appraisals.

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On its website, Zillow expressly states that Zestimates are not appraisals. The company says the price estimates are created by an algorithm that uses public and user-submitted data.

Whether potential home buyers treat them as appraisals is up for debate.

Since the lawsuit was filed, Zillow has announced it will reward $1 million to someone who can improve the Zestimate algorithm by making the price estimates more accurate.

According to Zillow’s website, 3.1 million Chicago homes have Zestimates.

Less than half the time, or 44.3 percent, Zillow says their Zestimates of Chicago home values are within 5 percent of the selling price and 68.1 percent of Zestimates are within 10 percent of the selling price.

Joining us is Dennis Rodkin, a real estate reporter with Crain’s Chicago Business, to give us the latest new on this developing story.

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