Market Watch: ‘It’s really a toy’

How reliable is Zestimate, Zillow's extremely popular home-valuation tool?


...some are asking about the reliability of the company’s so-called Zestimates, which provide an estimate of a home’s value based on a proprietary formula.


“We’ve determined the unpredictability in forecasting home prices far exceeds what we anticipated and continuing to scale Zillow Offers would result in too much earnings and balance-sheet volatility.”


In light of the challenges Zillow faced with its home-buying efforts, some people took to social media to call into question the accuracy of the Zestimate tool. “It’s really a toy,” said Mike DelPrete, a real estate analyst who tracks the iBuying sector. “It’s meant to drive people’s interest in property.”

NY Times: "Never heard of a tax assessor relying on Zestimate"

June 14, 2026
Can I Trust the ‘Zestimate’ for My Home on Zillow? | New York Times Real Estate Q&A Pretty remarkable statement in the middle of this short article: A Sotheby's agent is quoted as saying, "He has never heard of a tax assessor relying on a Zestimate." Don't rely on algorithmic valuations for your property's value. These estimates are interesting, but anything but the final word. Read the paywalled article on NYTimes.com >
3 reasons online home value estimates fail

"Discover the 3 reasons online home value estimates fail"

April 13, 2026
Why Your Zillow Estimate is Wrong | What Your Home is Actually Worth | Pauly Campanaro Discover the 3 reasons online home value estimates fail: they can't account for condition (your $40K kitchen remodel), they lag behind the market (using 60-90 day old data), and they don't know your competition (what's hitting the market this week). Learn why pricing right matters: homes priced correctly sell 19 days faster and for 3.8% more ($15K+ on a $400K home). Excerpted from this video posted by Pauly Campanaro:
Screenshot of a Twitter post by Ryan Lundquist, discussing a property's Zestimate history and price changes.

"Zestimate at $349K despite comps being above $600K"

September 15, 2023
@SacAppraiser | Ryan Lundquist Zestimate history. This property in Roseville listed at $349K, and the Zestimate matched the list price at $349K despite comps being above $600K. After 11 days the price went to $699K (sold $638K). Today's Zestimate shows no history of $349K. Maybe a brief Zestimate gets erased?
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