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Zillow Group, or simply Zillow, is an online real estate database company that was founded in 2006 and created by Rich Barton and Lloyd Frink, former Microsoft executives and founders of Microsoft spin-off Expedia. Spencer Rascoff is the current CEO of Zillow, Inc.
- 1 Business model
- 2 Acquisitions
- 3 Website features
- 4 Website activity
- 5 Zestimate
- 6 Critique of Zestimate accuracy
- 7 Controversy and lawsuits
- 8 See also
- 9 References
- 10 External links
Zillow has stated that it is a media company that generates revenue by selling advertising on its web site. In April 2009, Zillow announced a partnership to lend its real estate search engine to the web sites of more than 180 United States newspapers as a part of the Zillow Newspaper Consortium. Zillow shares advertising revenue from the co-branded sites with the newspapers and extends its reach into local markets.
- In April 2011 Zillow acquired Postlets, an online real estate listing creation and distribution platform. Terms of the deal were not disclosed publicly.
- In November 2011, Zillow acquired Diverse Solutions for $7.8 million.
- In May 2012, Zillow acquired RentJuice, a software-as-a-service company which allows landlords and property managers to market and lease their rental properties through a set of online tools. RentJuice was acquired for $40 million.
- On October 31, 2012, Zillow acquired the real estate shopping and collaboration platform, Buyfolio.
- Zillow acquired Lincoln, NE based mortgage technology company Mortech for $17 million on November 5, 2012.
- On November 26, 2012, Zillow acquired HotPads for $16 million. HotPads, founded in 2005, lists real estate and rental listings on a map-based web interface.
- On August 19, 2013, Zillow acquired StreetEasy for $50 million.
- On July 16, 2014, Zillow acquired Retsly, a Vancouver, B.C.-based startup that helps developers access real-estate data from multiple listing services (MLS).
Zillow has data on 110 million homes across the United States, not just those homes currently for sale. In addition to giving value estimates of homes, it offers several features including value changes of each home in a given time frame (such as one, five, or 10 years), aerial views of homes, and prices of comparable homes in the area. Where it can access appropriate public data, it also provides basic information on a given home, such as square footage and the number of bedrooms and bathrooms. Users can also get current estimates of homes if there was a significant change made, such as a recently remodeled kitchen. Zillow provides an application programming interface (API) and developer support network.
In December 2006, Zillow launched three new pieces of functionality: allowing users to post homes for sale and set a "Make Me Move" price (an informal way to pre-market a home), as well as a real estate wiki. In 2006, Zillow teamed with Microsoft to offer Bird's Eye View, a feature in Microsoft Virtual Earth, that shows (in certain areas) clearer aerial photographs taken from airplanes rather than conventional satellite imagery.  Zillow uses this functionality for entertainment-focused features on famous homes.
In December 2009, Zillow expanded its services to include the rental market. The addition of rental listings enabled users to list a home for rent and search for both rental homes and homes for sale.
Zillow Mortgage Marketplace
On April 3, 2008, Zillow launched a service called Zillow Mortgage Marketplace. This service allows for borrowers to get custom loan quotes without revealing personally identifying information.
Zillow Mobile apps allow users to view nearby homes based on the user's location.
- April 29, 2009 - iPhone application
- March 18, 2010 - Android App
- April 2, 2010 - iPad App.
- March 31, 2011 - Blackberry App
- July 13, 2012 - Windows Phone application 
- November 27, 2013 - Windows 8.1 application
On December 16, 2008, Zillow launched Zillow Advice, allowing people to ask real estate questions online and get answers from the Web site's community of experts.
Real estate market reports
Zillow produces home value reports for the nation and over 130 metropolitan statistical areas. The reports identify market trends including, but not limited to: five and 10-year annualized change, negative equity, short sales and foreclosure transactions.
Zillow also releases a Homeowner Confidence Survey. The survey is conducted by Harris Interactive and measures homeowners' perceptions about home value changes of their own home and the local market.
Neighborhood Boundary Maps (GIS Data)
The Zillow data team has created a database of nearly 7,000 neighborhood boundaries in the largest cities in the U.S. and made them available via Creative Commons Attribute-Sharealike license.
The company said it had more than 24 million unique visitors in September 2011, representing year-over-year growth of 103 percent. Of those users, 90% own a home and more than three quarters are looking to buy or sell within the next two years, helping others to buy or sell or looking to rent. Zillow claims over 50 million U.S. homes have been viewed. In some cities more than 90% of all homes that exist have been viewed, including San Francisco, Los Angeles, Boston and Seattle.
Zillow determines an estimate ("Zestimate," pronounced "ZEST-imate") for a home based on a range of publicly available information, including sales of comparable houses in a neighborhood. Zestimate does not take into consideration home-specific factors like recent remodeling, although there is an option to update the information for a particular home. The accuracy of the Zestimate varies by location depending on how much information is publicly available, but Zillow allows users to check the accuracy of Zestimates in their own region against actual sales. In many U.S. states, information on the transfer prices of real estate is readily available and accessible by the general public and is not exclusively held in realtors' databases.
In March 2011, Zillow released Rent Zestimates, which provide estimated rent prices for 90 million homes on both the Zillow website and all of its mobile apps.
On June 14, 2011, Zillow changed its algorithm used to calculate Zestimates. In addition to changing the current Zestimate for millions of homes throughout the country, Zillow changed historical Zestimate value information dating back to 2006. This resulted in drastic changes in both past and present Zestimate values for millions of homeowners.
Critique of Zestimate accuracy
In 2007, The Wall Street Journal studied the accuracy of Zillow's estimates and found that they "often are very good, frequently within a few percentage points of the actual price paid. But when Zillow is bad, it can be terrible."
According to Fortune, "Zillow has Zestimated the value of 57 percent of U.S. housing stock, but only 65 percent of that could be considered 'accurate'—by its definition, within 10 percent of the actual selling price. And even that accuracy isn't equally distributed." Fortune cites the state of Louisiana as an example, where "the site is just about worthless".
In October 2006, the National Community Reinvestment Coalition filed a complaint with the Federal Trade Commission stating that Zillow was "intentionally misleading consumers and real-estate professionals to rely upon the accuracy of its valuation services despite the full knowledge of the company officials that their valuation Automated Valuation Model (AVM) mechanism is highly inaccurate and misleading." In a letter dated May 4, 2007, the FTC elected not to investigate this complaint, which was later withdrawn by the NCRC.
Real estate agents with specific market knowledge are more likely to know specific factors affecting the sale of a home such as the overall condition of the home, room flow, landscaping, views, traffic noise, and privacy. These factors have been called unzillowables, a term coined in the real estate blogosphere.
Zillow may use the last bank, assessment or sales transaction for home value. Some of this data is very 'old' (over twenty years) and so even home descriptions may be inaccurate (i.e., change in size/structure). This may mislead buyers (who may feel asking prices are way out of range when compared to the 'Zillow price') and work against sellers (because Zillow lists homes as worth far less than the current 'value'--based on Bank/tax assessments and recent sales.)
Using data published on the Zillow website, the typical Zestimate error in the United States in July 2015 was $17,860.
Controversy and lawsuits
Zillow was sued four more times in two weeks for discrimination amid accusations of "'bro' frat culture and sexism." One of the complaints alleges that Zillow has a "‘frat house’ and ‘boys club culture’ where binge drinking and the willingness to participate in lewd discourse was rewarded by lucrative assignments in the form of Zillow managers routing incoming calls for potential sales leads." Zillow responded with their own statement that "the narrative being pushed by this law firm through their multiple lawsuits is completely inconsistent with those who know and work with Zillow. ... The behavior described does not accurately depict our culture or the 1,200 Zillow employees."
- Lerman, Rachel (10 December 2014). "Zillow CEO Spencer Rascoff gets book deal with major New York publisher". Puget Sound Business Journal.
- "Zillow.com Site Info". Alexa Internet. Retrieved 2014-10-13.
- Wortham, Jenna (April 1, 2009). "Newspapers Begin to Use Zillow". The New York Times.
- Stynes, Tess (2010-07-09). "Yahoo, Zillow to Pair Up on Web Real-Estate Ad Network". The Wall Street Journal.
- Leena Rao, TechCrunch. "Zillow Buys Real Estate Listings Creation And Distribution Tool Postlets." April 11, 2011. Retrieved April 11, 2011.
- "R. Newman, Zillow Press Release" (Press release). Nov 2, 2011.
- Brier Dudley, Seattle Times. "Zillow buys Rent Juice, reports blowout quarter." May 2, 2012.
- Leena Rao, TechCrunch. "Zillow Acquires Real Estate Shopping And Collaboration Platform For Brokers And Homebuyers, Buyfolio." October 31, 2012.
- Leena Rao, TechCrunch. "Zillow Acquires Mortgage Software Company Mortech For $17 Million." November 5, 2012.
- Frederic Lardinois, TechCrunch. "http://techcrunch.com/2012/11/26/zillow-acquires-rental-and-real-estate-search-site-hotpads-for-16-million-to-grow-its-rental-marketplace/ Zillow Acquires Rental And Real Estate Search Site HotPads For $16 Million To Grow Its Rental Marketplace." November 26, 2012.
- Frier, Sarah; Levy, Ari (August 19, 2013). "Zillow Buys Real-Estate Site StreetEasy for $50 Million". Bloomberg.
- Lardinois, Frederic July 16th 2014. TechCrunch. "Zillow Acquires Retsly, A Service That Helps Developers Access Real Estate Listings"
- PRNewsWire. "Zillow Group to Acquire DotLoop." July 22, 2015.
- Zillow Group. "." January 03, 2016.
- Zillow CEO shares new rules of real estate, CBS News, 28 January 2015, retrieved 30 June 2015
- "Zillow.com Launches Beta Real Estate Site: Valuations and Data on More Than 60 Million Homes in U.S", PRNewsWire
- Interview with Zillow's CFO, Spencer Rascoff, Podtech.net
- Interview with the Zillow development team, Podtech
- Cook, John (2006-04-15). "Zillow.com offers a closer look at homes". Seattle PI.
- "Zillow: Monica's Apartment From Friends Worth $2.9 Million". Curbed. 2006-06-23.
- "Zillow launches rental listings and search service". Reuters. 2009-12-15.
- Hagey, Paul. "Zillow takes over real estate search at MSN Real Estate after Move Inc.’s exit". Retrieved 2 July 2014.
- Gopal, Prashant (2008-04-03). "Zillow Opens Online Mortgage Marketplace". Businessweek.com. Retrieved 2011-02-26.
- "Waltham, MA News - Waltham, Massachusetts - Wicked Local Waltham". Dailynewstribune.com. Retrieved 2011-02-26.
- (Not updated since initial release as of 2015-03-26. Also listed as "This app is no longer published" on 2015-03-26.) You can see it at http://www.windowsphone.com/en-us/store/app/zillow/f2cccea4-14a1-e011-986b-78e7d1fa76f8
- Cohen, Aubrey (2008-12-16). "Get advice from Zillow | Seattle Real Estate News - Seattle Post-Intelligencer". Blog.seattlepi.com. Retrieved 2011-02-26.
- Timiraos, Nick (May 6, 2009). "Affluent Homeowners: Underwater and Sinking Fast". The Wall Street Journal.
- "Most U.S. homeowners think a bottom has been reached: Zillow". Reuters. May 14, 2009.
- "Form 8-K". United States Securities and Exchange Commission. October 4, 2011.
- Geron, Tomio. "Zillow Buys Real Estate Listings Service Postlets". Forbes.
- "Maryland tax assessment database allowing searches of all property transfers". Dat.state.md.us. Retrieved 2011-02-26.
- "Zillow's Rent Zestimates to provide rent prices for 90 million homes". VentureBeat. Retrieved 2013-09-29.
- Hagerty, James R. "How Good Are Zillow's Estimates?", The Wall Street Journal, 2007-02-14. Retrieved on 2009-02-25.
- O'Brien, Jeffrey M. (February 7, 2007). "What's your house really worth? (cont.)". CNN.
- "Federal Trade Commission Complaint"
- "Zillow Zestimate Accuracy Chart". Real Estate Decoded. Retrieved 21 July 2015.
- "Jennifer Young vs. ZILLOW, INC". Retrieved 9 February 2015.
- "Zillow's alleged "frat house" culture leads to new lawsuit". Fortune. Retrieved 5 December 2014.