Can You Count on the Accuracy of a Zillow Home Valuation?
Friday, December 9th, 2011Zillow, the home value and sales information site, came on the scene when the real estate bubble was still inflated. Countless homeowners enjoyed the novelty of plugging in their address each day to see if their home had increased in value over the day before.
Now, in most markets, Zillow’s home valuations (Zestimates®) don’t look as rosy as they once did. And human nature generally dictates that when your home is valued high, you don’t ask questions. But when your home’s value is underestimated, some homeowners have more reason for concern.
Zillow’s algorithms have been known to cause trouble for prospective home sellers, buyers and real estate investors alike. Since Zillow’s valuations are based on publicly available data, like square footage, the number of bedrooms and bathrooms, and the selling price of other area homes, the best house in the neighborhood could be dinged, while the worst could be overvalued.
ZIllow does not take into consideration variables such as upgrades, improvements, quality of construction or the condition of the house. The company offers many disclaimers, including that their Zestimates are not appraisals. Still, when negotiating on the sale of a home, it can be tough to convince a potential buyer to ignore an online valuation—especially if the asking price is above it.
Here’s an example of how Zillow can get it wrong. A 7,500-plus-square-foot home on five waterfront acres is listed for sale at nearly $6 million. However, the Zilllow valuation is $3.35 million less. Zillow’s algorithm doesn’t know that since the property was last sold for $1.25 million in 2008, the original structure was demolished and a new home was built.
Zillow is the go-to site for many people who are in the first stages of researching homes. And if they see a list price much higher than the Zestimate, they may not look any further. Real estate agents who know a local market find this frustrating; but listing agents may always add comments on a Zestimate page to point out features that warrant a higher listing price.
Whether you're buying or selling investment property, Zillow can be a good place to gather basic information on what's for sale and for rent in any city or neighborhood. But using a Zestimate as anything more than a starting point is, well, pointless.