You've heard of Zillow.com, right?
It's the enormously-popular website that provides easy access to an estimate (Zillow calls it their "Zestimate") of a home's value. You type in the address, and presto, Zillow claims to have the home's current value pinpointed right down to the dollar, in real time.
One of the scary features, in fact, is the value trend graph, which shows its' read on how the value of the selected home has changed over time. It's kind of scary if you see the graph going down like a dismal stock chart.
Anyway, the important question here is: how accurate is it?
Here's the answer, in a nutshell: sometimes it is quite accurate, but it can also be WAY, WAY off. So if you read no further, at least know that it should not under any circumstances be entirely relied upon.
Moral of the story: Zillow can be an OK place to start, but you really need to check it against the opinion of a trusted local real estate expert who knows the area and knows the market.
I've inserted a few excerpted paragraphs from a very helpful Wall Street Journal article printed today (I'd give you the link, but you have to be a subscriber to view it)...
"...A Wall Street Journal
analysis of 1,000 recent home sales shows that Zillow's "Zestimates"
often are very good, frequently within a few percentage points of the
actual price paid. But when Zillow is bad, it can be terrible -- off
the mark by more than 25% on one in 10 homes. In one case it was off by
$2 million..
![[zillow]](http://online.wsj.com/public/resources/images/PJ-AJ661_pjZILL_20070213161450.jpg) |
| A four-bedroom, five-bath house in Fall City, Wash. Zillow estimate: $661,756 Sold for: $2,690,000 |
"...The Journal looked at transaction prices recorded for
1,000 recent home sales in seven states, using data from First American
Real Estate Solutions, a data provider in Santa Ana, Calif., and
compared those prices with Zillow estimates, which didn't yet reflect
the sales. The median difference between the Zillow estimate and the
actual price was 7.8%. (That was close to the 7.2% median "margin of
error" reported by Zillow itself on all transactions involving homes
whose value it has estimated.)"
"The estimates were about equally split between ones that were too high and those below the mark."
"Zillow came
within 5% of the price in a third of the transactions studied by The
Journal. It was more than 25% off target on 11% of them. In 34 of the
1,000 transactions, Zillow was off by more than 50%."
"Zillow had estimated that a four-bedroom,
7,600-square-foot home in Fall City, Wash., was valued at $661,756. The
home, built last year, sold in early January for $2.7 million. "If you
don't visit the property, you're never going to know that it's in an
exclusive, gated part of the neighborhood," says Maria Danieli, who
represented the sellers. Ms. Danieli says Zillow may be fine for
"cookie-cutter" neighborhoods but "they can't compute" the values of
the luxury homes she sells."
"Zillow executives acknowledge that the estimates can
be way off in some cases. The estimate "is a starting point" for people
trying to figure out how much a home should cost, says Amy Bohutinsky,
a spokeswoman for the company. "We don't recommend it as the final
word."
![[zillow]](http://online.wsj.com/public/resources/images/PJ-AJ665_pjZILL_20070213192617.jpg) |
| El Cerrito, Calif. Zillow estimate: $544,361 Sold for: $80,000 |
"...Zillow tends to work best for midrange homes in areas
where there are a lot of comparable houses, he says. It is less
accurate for low- and high-end homes because there are fewer of those
and thus less data available from comparable sales, known as "comps."
Values of rural homes are hard to gauge for the same reason. Partly for
that reason, none of the Web sites can offer 100% coverage of U.S.
homes; Zillow says it has estimates on about 57% of all homes."
"Even where there are numerous apparent "comps,"
computer programs like Zillow's can stumble when vital information is
missing. Data fed into the computer, for instance, may not reflect the
fact that a house has just been remodeled, destroyed by fire or put
into foreclosure. Reported prices can be misleading, too. Sometimes
homes are sold between family members for a token price, or sellers
offer incentives to buyers, such as help with closing costs, that
aren't reflected in the recorded price."
"Zillow isn't the only site offering such free
estimates. Others include RealEstate.com, RealEstateABC.com and
Reply.com. But Zillow's site gets more traffic than those rivals. All
of these sites appear to have overestimated the value of a house on
Olivant Street in a tough area of Pittsburgh that sold for $700 last
year in an auction of foreclosed homes. As of early this month, Zillow
estimated the value at about $33,000, RealEstate.com at $57,000,
Reply.com at $69,000 and RealEstateABC.com at $86,000. Several nearby
houses are abandoned or boarded up, blighting the block -- something
computer models don't take into account..."
"...Real-estate agents and appraisers tend to sneer at Web
site valuations and insist that consumers still need their local
expertise to get a true idea of values. Masood Samereie, an agent at
Century 21 Hartford Properties in San Francisco, says one of his
clients last year lost his chance to buy an attractive home because,
relying on Zillow, he made an unrealistically low offer."
What has your Zillow experience been? Have you used it before? Did it end up giving you accurate results? If not, how much was it off by? (Please leave your comments to make this a meaningful community discussion). Thanks!
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