Zillow.com launches in early 2005 by online technology leaders Rich Barton and Lloyd Frink. Zillow is an online real estate service dedicated to helping buyers, sellers, owners and real estate professionals get an edge in real estate by providing valuable tools and information -- all for free.

Longstanding RELO network, a network of 650 local and regional brands in residential real estate, changes its name to Leading Real Estate Companies of the World.

US Department of Justice (DOJ) formal files suit against the National Association of Realtors®  charging NAR for adopting overly restrictive policies for the online display and sharing of property listings (MLS) information. 

Google announces Google Base and Google Earth.

In one of the longest and strongest upswings in residential real estate in US history, the number of existing homes shatters the 7 million mark. The boom officially ends in the third quarter according to the National Bureau of Economic Research Inc .