CoStar : Announces Winners of 2013 CoStar Power Broker Awards

WASHINGTON, D.C., March 21, 2014 - CoStar Group, Inc. (NASDAQ: CSGP), the leading provider of commercial real estate information, analytics and marketplaces, is pleased to announce the winners of the 2013 CoStar Power Broker™ Awards, recognizing the best of the best in commercial real estate brokerage.

With the largest professional research organization serving the commercial real estate industry, CoStar is uniquely positioned to identify the top firms and brokers in each market. Every year, CoStar's research team verifies and records the commercial real estate sales and lease transactions that closed during the previous year, and CoStar presents CoStar Power Broker Awards to a select number of brokerage firms and individual brokers that closed the highest overall transaction volumes in commercial property sales and leases in each market.

"CoStar is proud to honor the individual brokers and firms who perform at the industry's highest level each year," said CoStar Group founder and CEO Andrew C. Florance. "These industry leaders deserve to be recognized for their expertise, hard work and superior deal-making abilities. We extend our congratulations to this year's winners on their exceptional sales and leasing success."

In addition to recognizing brokers with national real estate powerhouses such as CBRE, JLL, Cushman & Wakefield, Cassidy Turley, Newmark Grubb Knight Frank, Avison Young and Colliers International, winners include hundreds of other top brokers and firms in over 90 markets across the country. A complete list of CoStar Power Broker Award winners by market can be found atCoStarPowerBrokers.com.

All CoStar Power Broker Awards are based on transaction data in CoStar's commercial real estate database, which is the largest, independently researched database of commercial real estate property information available online. Information in CoStar's database is verified and continuously updated by over 1,000 CoStar research analysts. CoStar's database contains more than 4.3 million commercial properties, and the total square footage of gross building area tracked and maintained by CoStar exceeds 93 billion square feet.

CoStar Group (NASDAQ: CSGP) is the leading provider of commercial real estate information, analytics and marketplaces. Founded in 1987, CoStar Group conducts expansive, ongoing research to produce and maintain the largest and most comprehensive database of commercial real estate information. Our suite of online services enables clients to analyze, interpret and gain unmatched insight on commercial property values, market conditions and current availabilities. Through LoopNet, the Company operates the most heavily trafficked commercial real estate marketplace online with more than 8 million registered members. CoStar Group operates websites that have over 8 million unique monthly visitors in aggregate. Headquartered in Washington, DC, CoStar Group maintains offices throughout the U.S. and in Europe with a staff of more than 2,000 worldwide, including the industry's largest professional research organization.www.costar.com.