The project called for complete replacement of many Hauptbahnhof buildings except for the steel-reinforced building in the middle that covers the platforms 11 through 26. The new single building utilises a modern and more unified design surrounding the central platform hall along with a new aboveground pedestrian zone in the east towards Karlsplatz (Stachus). A new 75-meter office tower will be built at the northwestern corner of the area to be used for a branch of Deutsche Bahn's administration department. A new underground pedestrian tunnel will be built at western parts of platforms 11–26, connecting the Starnberger and Holzkirchner wing stations directly as well as the platforms 11–26 and subway stations. This will reduce the need to walk to the main concourse for transferring to other trains.