Fandango Inc., one of the nation’s leading movie ticketing websites, is planning to nearly double the size of its Los Angeles headquarters.

The company, sells tickets online for films at major theater chains, will also move up — literally — in May as it departs 17,800 square feet of offices on the ground floor for 30,000 square feet on the fourth floor in the same building at 12200 W. Olympic Blvd., real estate brokers said.

The price of the lease wasn’t disclosed, but real estate professionals familiar with the office market valued it at close to $7 million. Fandango’s offices are in the Westside Media Center, a three-building complex at Olympic Boulevard and Bundy Drive.

Fandango is a unit of Comcast Interactive Media, the digital division of Philadelphia-based cable giant Comcast Corp.

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