The former Wakefield Magistrates' Court building could be converted into flats and offices under new plans.
A planning application submitted to Wakefield Council would mean the Grade-II listed former court house would become 14 flats and office space if permission is granted.
The building was last used as a court in September 2016 and has been empty since.
Under the plans the 1970s frontage on King Street would be converted into a "glazed curtain walling system and stone cladding".
The historical cell block layout, including cell doors, would be retained under the plans.
Meanwhile a £1 million project is underway to repair the structural damage at the former Wakefield Crown Court.