Proposals for a railway line to Kaitaia and the Far North existed as early as the 1870s, but it was not until 1909 that preliminary surveys were conducted. After the North Auckland Line was linked to and extended over the Opua Branch in 1911, construction progressed in earnest from Otiria towards Kaikohe: initial work had been undertaken in 1910. On 1 May 1914, this section opened. A small amount of further construction took place over the next two years, but World War I meant that no work took place between 1916 and 1919. The resumption of work led to the completion of the line to Ōkaihau on 29 October 1923.