Construction on the line's second part, from Levanger to Sunnan, started in 1901. Part of the reason for the early start was to help employ older navvies who were working on the southern section during the summer. By early 1904, the right-of-way to Fleskhus was completed and the laying of tracks could begin. The bridge over Verdalselva was built using of stone, which had to be transported from Bagloåsen in Levanger. The superstructure was built by Vulkan of Oslo and was installed between 9 September and 27 November 1903.