The process of establishing a Ring Line to serve the northern parts of Oslo started in the late 1980s.
The plans were passed by the city council in 1997, and financing was secured in 2000 through Oslo Package 2.
Construction started in June 2000, and Nydalen was opened on 20 August 2003, at the same time as Storo.

The background for building the rapid transit system to Nydalen, was the urban redevelopment from an industrial to a mixed residential and commercial area during the 1990s and 2000s.
About 200 companies have moved to the vicinity of the station, and by 2007 there were 14,800 jobs in the area.
The area has several large information technology and telecommunication companies, including ErgoGroup, Agresso, EDB Business Partner, Visma, TDC and NetCom.
Large cultural institutions in the area include the national touring theater Riksteatret and the national touring concerts Concerts Norway, the publishing companies Hjemmet Mortensen, De Norske Bokklubbene and Schibsted's printing press.
Public offices include the offices of the Nodre Aker Borough and the Norwegian Police Security Service.

In 2005, BI Norwegian Business School moved into their new campus across the street from Nydalen Station.
Seven thousand students plus faculty work at the school, of which 85% use public transport.
From 2011, the new Nydalen Upper Secondary School will also be located in Nydalen.
The process of establishing a Ring Line to serve the northern parts of Oslo started in the late 1980s. The plans were passed by the city council in 1997, and financing was secured in 2000 through Oslo Package 2. Construction started in June 2000, and Nydalen was opened on 20 August 2003, at the same time as Storo.
The background for building the rapid transit system to Nydalen, was the urban redevelopment from an industrial to a mixed residential and commercial area during the 1990s and 2000s. About 200 companies have moved to the vicinity of the station, and by 2007 there were 14,800 jobs in the area. The area has several large information technology and telecommunication companies, including ErgoGroup, Agresso, EDB Business Partner, Visma, TDC and NetCom. Large cultural institutions in the area include the national touring theater Riksteatret and the national touring concerts Concerts Norway, the publishing companies Hjemmet Mortensen, De Norske Bokklubbene and Schibsted's printing press. Public offices include the offices of the Nodre Aker Borough and the Norwegian Police Security Service.
In 2005, BI Norwegian Business School moved into their new campus across the street from Nydalen Station. Seven thousand students plus faculty work at the school, of which 85% use public transport. From 2011, the new Nydalen Upper Secondary School will also be located in Nydalen.
Nydalen (station)