Are Zillow’s Estimates on the Mark?
Wednesday, February 14th, 2007Last year, the website Zillow.com began offering consumers computer-generated free home value reports and other online tools for real estate buyers and sellers. However, some are questioning just how accurate the estimates are. A recent Wall Street Journal analysis of 1,000 recent home sales showed that Zillow’s estimates were often very good. Quite often they were within a few percentage points of the actual price paid. Unfortunately, the analysis found that when Zillow’s estimates were off, they were way off. In fact one in 10 homes were more than 25% off. The Wall Street Journal reported that in one situation it was more than $2 million off.
The median difference between the Zillow estimate and the actual price was 7.8%. Zillow itself reports a median margin of error of 7.2% for transactions where they have estimated the value. A spokesperson for Zillow acknowledged that the estimates could be way off in some situations, but that people should view the estimates as “a starting point” when trying to figure out how much a home should cost. They do not recommend them as the final word.
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