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Bloomberg Customers takes on

Posted by: Chris Palmeri on March 12, 2007

Home pricing site caused a huge sensation when it started offering its Zestimates on what people’s houses are worth. All the attention (and online traffic) has spurred rival to respond. The company’s new Real-Time Market Snapshot gives online home shoppers access to more recent sale prices in a particular neighborhood.

Some background: was among the first Internet sites devoted to housing. It was actually started by the National Association of Realtors, a group that always wants to make sure its got a piece of any home sale. has long offered a “What’s Your Home Worth” feature. Both it and Zillow rely on county deed records to generate the data. While gives a wide price range for a property, Zillow gives a specific estimate, and thus produces a lot more buzz.

Now the Realtors are striking back. “The problem with the county data is it’s about three months old,” says Errol Samuelson, president of His new Real-Time service uses data gleaned from the many multiple listing services across the country. That data is generated by the Realtors themselves. Having more up-to-date data is important as housing prices soften.

In order to get that Real-Time snapshot you have to leave a particular property address and your contact info with, which then feeds your request to a local Realtor. Thus, you’ll get contacted by an agent. On the sample snapshot that I got, the transaction data was more recent, but there still wasn’t a specific estimate of what the property is worth.

I should add, while a recent study by the Wall Street Journal found Zillow’s Zestimates to be fairly accurate. Their Zestimate for the sample house I used was $800,000. It’s actually worth $1.3 million, judging by recent sales on the block. That’s a huge discrepancy. The online real estate wars continue.

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Reader Comments

john harper

March 10, 2007 11:52 AM

As an agent in the East Bay area of California and a person who has been marketing on the Internet for over 12 years - I must say, the NAR and - STILL DON'T GET IT!

While people will complain about inaccuracies, they will continue to use Zillow over because Zillow gives it away to the consumer.

While we continue to use some forms on our site, we are moving more away from them to the give it away model.

The NAR's biggest problem is not Zillow or Trulia or any of the others - It's lack of vision and creativity. When you're stuck in REACTION it's bad enough. But, when you're stuck in reactivity and trying to hold on to the past - you're lost.

Rental Property

March 11, 2007 02:37 AM

I find this a really interesting article, in the UK we can get actual sold house price data from the land registry and there are a number of sites that provide this. It appears that this is not something that is available in the US otherwise why dont the sites just use that data rather than 'guesstermats'. The actual sold price data would be much more accurate.


March 11, 2007 12:42 PM

In a drastically slow market, not even recent data is sufficient because the data doesn't exist due to lack of sales and one must use data from further afield to estimate it, data that is not always comparable. Appraisals lag on the the way up and on the way down and lag the most in hot and cold markets; it is simply the nature of the data.

hal cline

March 12, 2007 12:07 PM

Both and provide pictures of houses, basic details ( number of rooms, square footage), and a price. Where provides the address of each house, and details of houses on and off the market, and a estimate based on statistical methods, only provides addresses by contacting an agent. Their prices are the offer prices and in this housing market usually an imaginary price. Where the public records includes previous transactions by address, it is not easy to match that with specific houses without knowing the address.

Whether zillow's estimates are accurate is secondary to being able to compare houses in an area and to compare them with actual past transactions. I know real estate agents get extremely uncomfortable and nervous, just by mentioning in any conversation. That can not be a bad thing.

Frances Flynn Thorsen

March 12, 2007 12:25 PM

Zillow has a technology that is improving over time. I think that the real estate industry is evolving from an it's-us-against-them kind of attitude to a more collaborative sand box.

There are some areas of the country where there is still a great disparity in online valuation engines. We illustrated one of these recently on, where a house listed at $7.5 million is shown alongside a Zestimate of $4.5 million:

Ben Tyson

March 12, 2007 03:14 PM

I feel that has provided information in a very user friendly format which is why there was so much buzz around there website. I really think that has there hands in to many pots as it is and that the everyday consumer will stick with zillow because there will not be any reason to pick over zillow.


March 12, 2007 05:56 PM

I much prefer neutral sources like trulia for listings and for property research and sales comparables (it only seems about 2 weeks old on there, not 3 months). And at least that data is official from the county. Who is auditing these Realtor self reported 'real time' numbers you mentioned?


March 13, 2007 06:20 PM

Part of Realtor's wanting an agent to contact you after you've asked them about a property is so that they can sell you on something and so that they can put together a price for the place.

To say that Realtor has "real time" figures is like saying Kramer on Seinfeld offered real time movietimes. They just do it by hand probably after querying zillow.


March 13, 2007 11:16 PM

Escuse me, but does anyone actually use these services I see written about here!? I typed my zip code into the trulia site, along w/ a spread of $50000 to $150000, and got 2, yes, that's right, 2 listings. isn't much better, and gives you a choice of 4 cities to search in the entire state of Texas. Yes, 4 cities. These sites are USELESS. Please, do what we and everyone we know does: go to They show EVERY MLS listing in the US and many other cities. Yes, every single listing. Silly isn't it.

Little Birdie

March 13, 2007 11:37 PM

I hear that is working on a major overhaul of their property listing search, and is supposed to release it sometime in the next couple of months. Does anyone else know anything about this, and whether it's supposed to close the gap between its and Zillow's functionality?

Kaushik Sirkar

March 14, 2007 03:09 AM

I have seen lots of discussion in the blogosphere about zillow and what it will do to the Real Estate industry. This news was 'hot' a few months ago and then basically disappeared. Maybe with this new announcement people will start talking again...

-Kaushik Sirkar
Chandler, AZ Realtor

March 20, 2007 04:33 PM

I think Zillow is trying hard to plenish and update their databases, but for the time being the fact remains that based on our research most Zestimates by Zillow are usually at least 20 - 25% below the current market value.

The problem that Zillow faces is that often county records do not reflect e.g. the actual size of the home in regards to square footage as well as regarding bedrooms and baths, meaning usually Zillow shows a lesser than the actual number. This discrepancy between inaccurate county records and the actual facts of a property lead to the reduced Zestimates on Zillow as it seems that the price per sq.ft. is used to calculate their automated Zestimates.

True, home owners can claim their property and make adjustments, but while these adjustments are displayed on Zillow, it seems as if Zillow doesn't take those corrections by home owners regarding their properties into account when calculating their Zestimates.

Nonetheless, Zillow is still a young search engine specific to the home industry, and since it started a year ago it has already improved a lot, and over time their databases will interact and function more accurate. Also, Zillow is a great advantage for home and area searches, even if their satellite photos are at least 2 years old and not updated for now, but it does give prospective home buyers an idea about the area and also the new feature of comps/actual homes sold is a big, big plus and should help to bring the Zillow's Zestimate's up-to-date.


March 26, 2007 01:36 PM

Little Birdie,'s new property search redesign launched just last week as a beta, a link to it at the top of the home page.

Early as it is, does anyone have any thoughts on whether this change will have any affect on how consumers use the site and view its listings?


April 12, 2007 01:28 AM

Zillow is great. I dont use their estimate to judge prices. After all its all a bubble anyway. Im my area the bubble started in early 1998 since that was the last time we had rational prices. Since zillow provides historical sales in 1998 I simple add in year over year appreciation equal inflation to get actual price home should be selling for today. It has been proven that homes only appreciation at rate of inflation. I will continue to use zillow and watch as declines are currently taking hold. We are already down 10% in my target city. I expect this to continue down 40-50% from peak. I fail to understand why so many mistakenly believe prices wont go down in the next few years. Any comparable price you see should not be considered. We currently are seeing major corrections starting with subprime. It was not the loan thats the problem but the pricing of homes.

James Boyer

May 5, 2007 10:46 AM

It would be really nice if got with it and started doing what they should have done 10 years ago, rather than waiting for someone to come and take their lunch. But that is what happens when your sitting back and thinking you have everything that will ever need to be done, finished.

James Boyer
Realtor Associate
Keller Williams Realty
488 Springfield Ave.
Summit, NJ 07901

Kevin Englund

May 21, 2007 11:00 AM

I couldn't get Zillow to accurately search or list my Make Me Move price and customer service doesn't respond. I tried Cyberhomes but they wouldn't allow price adjustment for a pool and other home features. Also like Redfin's approach but they aren't in this area yet. Have used FreeRateSearch for anonymous mortgage searches with success. Overall seems the real estate industry has been slow in catching up to the potential of Internet technology. (I trade stocks online and used Progressive for boat insurance) but maybe the tide is now turning.

James Thomas Boyer

May 22, 2007 02:29 PM

Zillow cannot give you accurate quotes, why? First off they do not have accurate data, Second off they don't have the learned knowledge of the local area that a Pro Realtor will have. If you are seriously thinking of selling, or buying a home, forget Zillow it is worthless.

Redfin, may have a nice looking website, but would you trust a glorified Wal-mart check out clerk to help you with the biggest financial transaction of your life?? On top of that, in many states it is against the law, for good reason for a Realtor to write a offer on a home, that Realtor has not personally been inside. Also it can be seen as mortgage fraud for redfin to rebate part of the commission.


Louis Cammarosano

June 7, 2007 10:43 AM

All this instant homevaluation talk is old news.

Zillow did nothing new by offering Zestimates other than take last millenium's technology and wrap it in one big "Z".

HomeGain had an instant homevaluation tool on its web site back in 1999-2001.

HomeGain recently brought its tool back-you can try it here.

Unlike Zillow, Homegain does not try to convince its users that its accurate and encourages its visitors to contact a Realtor to help value and sell their homes.

For some differences between HomeGain and Zillow, please see "Why HomeGain Beats Zillow"


September 7, 2008 09:43 PM is a very good service provider.I have gained much from you.I still anticipate more from you.


January 20, 2009 08:19 PM

I agree sites like where they are doing real estate listings for free are going to one day rule the space that occupied.


January 23, 2009 12:03 AM

It was actually started by the National Association of Realtors, a group that always wants to make sure its got a piece of any home sale. has long offered a “What’s Your Home Worth” feature. Both it and Zillow rely on county deed records to generate the data. While gives a wide price range for a property, Zillow gives a specific estimate, and thus produces a lot more buzz.
Home Loans

Thank you for your interest. This blog is no longer active.



BusinessWeek editors Chris Palmeri, Prashant Gopal and Peter Coy chronicle the highs and lows of the housing and mortgage markets on their Hot Property blog. In print and online, the Hot Property team first wrote about the potential downside of lenders pushing riskier, "option ARM" mortgages and the rise in mortgage fraud back in 2005—well ahead of many other media outlets. In 2008, Hot Property bloggers finished #1 in a ranking of the world's top 100 "most powerful property people" by the British real estate website Global edge. Hot Property was named among the 25 most influential real estate blogs of 2007 by Inman News.

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