Leicester City Football Club have formally submitted plans for the expansion of the King Power Stadium.
The club confirmed they had applied for permission from Leicester City Council following a public consultation in August and September.
It also wants to build a new hotel and business centre, a flagship fan store, an events arena and residential flats.
The council is expected to make a decision on the proposed development next year.
The club is seeking to expand the capacity of their ground by 8,000 seats to 40,000.
If approved, their ground would become the 10th largest among current Premier League sides.