During the rebuilding of the central sections of the Bielefeld tramway underground, the underground Stadtbahn station was not built under the Hauptbahnhof for cost reasons.
The Hauptbahnhof Stadtbahn station was instead built 150 m to the south-east and is connected to the station forecourt by a covered travelator (popularly known as die Tüte: "the bag").
At the beginning of the 21st century the old freight yard to the north of the line was demolished to make room for an entrance and exit of the Ostwestfalendamm expressway and the Neue Bahnhofsviertel (new station district).

The construction included the widening and extension of the pedestrian tunnel to the north and the provision of barrier-free access to existing platforms and to the heritage-listed station building.
Additional tracks and a new platform were built on the north side of the station.
The station was expanded to seven platform tracks next to four platforms.

The expansion and modernisation of the station were intended to be completed in 2000.
But after the bankruptcy of the general contractor, construction work was suspended due to unresolved financial issues for a period of 17 months.
Since the reconstruction took place under traffic, this resulted in significant disruptions for passengers.
Construction was finally completed in September 2006.
These works cost a total of €26.2 million.

The station is now directly connected to the new station district on the north side, increasing the attractiveness of the city.
The dining establishments, nightclubs, spa and leisure facilities benefit from the direct access to the station.
The station district and the railway station also support each other, as for example the car park of the new district is also used by rail passengers.
During the rebuilding of the central sections of the Bielefeld tramway underground, the underground Stadtbahn station was not built under the Hauptbahnhof for cost reasons. The Hauptbahnhof Stadtbahn station was instead built 150 m to the south-east and is connected to the station forecourt by a covered travelator (popularly known as die Tüte: "the bag"). At the beginning of the 21st century the old freight yard to the north of the line was demolished to make room for an entrance and exit of the Ostwestfalendamm expressway and the Neue Bahnhofsviertel (new station district).
The construction included the widening and extension of the pedestrian tunnel to the north and the provision of barrier-free access to existing platforms and to the heritage-listed station building. Additional tracks and a new platform were built on the north side of the station. The station was expanded to seven platform tracks next to four platforms.
The expansion and modernisation of the station were intended to be completed in 2000. But after the bankruptcy of the general contractor, construction work was suspended due to unresolved financial issues for a period of 17 months. Since the reconstruction took place under traffic, this resulted in significant disruptions for passengers. Construction was finally completed in September 2006. These works cost a total of €26.2 million.
The station is now directly connected to the new station district on the north side, increasing the attractiveness of the city. The dining establishments, nightclubs, spa and leisure facilities benefit from the direct access to the station. The station district and the railway station also support each other, as for example the car park of the new district is also used by rail passengers.
Bielefeld Hauptbahnhof