The Commission on Chicago Landmarks unanimously voted Thursday to approve the Cubs' plans to build a two-story sportsbook adjacent to Wrigley Field.

The addition will take at least a year to build, sources told ESPN. It will be open to the public before, during and after games, and while fans will be able to enter Wrigley Field from inside the sportsbook, they won't be required to be attending the game to make bets inside.