 WASHINGTON--BUSINESS WIRE--CoStar Group, Inc. NASDAQ: CSGP, the leading provider of commercial real estate information, analytics and online marketplaces, announced today that it has reached a definitive agreement to acquire Homes.com, a division of Dominion Enterprises, for 156 million in cash. Homes.com is a well-recognized residential property listing and marketing portal that supports over 500,000 residential agents and brokers in the home sale process. Approximately 5 million people v 