The lawsuit, filed in federal court in Chicago, alleges that the renovation and expansion project discriminated against people with disabilities.
If found guilty, the Cubs could be forced to make costly changes to the stadium as well as pay damages.
While the work "enhanced the game day experience for many fans, particularly those able to take advantage of premium clubs and other luxury accommodations, the same cannot be said for fans with disabilities,” the 29-page complaint states.
The Cubs had 'ample opportunity' and an obligation under the law 'to incorporate wheelchair seating and other accessible elements into the updated facility.'
U.S. Attorney John Lausch
The Cubs had "ample opportunity" and an obligation under the law "to incorporate wheelchair seating and other accessible elements into the updated facility,” U.S. Attorney John Lausch said in a statement.