Seattle startup Zillow.com said Tuesday it will supply Yahoo Inc.'s online real estate service with a tool to estimate what any home might be worth.
A link on Yahoo's site will let users type in a building address and see Zillow.com's home value estimate combined with a Yahoo map of the area.
Yahoo, based in Sunnyvale, Calif., had previously partnered with HomeGain.com to provide information on home valuations.
Zillow.com calculates its estimates — used by potential buyers and sellers, as well as those just curious about their neighbors — based on county records and other data.
The Seattle company launched a test version of the valuation tool in February, and currently has data on nearly 67 million U.S. homes.
Jordan Cobert of HomeGain said the company would continue to provide Yahoo with technology to help people connect with real estate agents, but would no longer provide the information about home values.
Chris Saito, senior director of Yahoo's real estate division, confirmed the new deal with Zillow.com and the change in Yahoo's relationship with HomeGain.
On its own Web site, Zillow.com uses close-up photographic maps from Yahoo rival Microsoft Corp. (MSNBC is a Microsoft - NBC joint venture.)