Rail Motor Stopping Place No. 65, which was opened on 1 October 1934, was at the approximate location of the present Cobblebank station. The station, built as part of the
Regional Rail Revival project, was provided to serve future residential developments nearby. On 26 October 2018, the designs for the station were released and, at the same time, it was renamed from
Toolern to
Cobblebank. Despite that, it still uses the station code for Toolern (TLN). with around 1000 community members attending the celebration. The station opening coincided with the
duplication of 18 km of track between Deer Park West and
Melton. and it was concluded that the Western Rail Plan, including electrification to Melton and Wyndham Vale, and Geelong fast rail, would be cancelled. However, in April 2026, the Victorian Government announced a Melton line upgrade that included aspects of the Western Rail Plan, involving extension of the platform at Coblebank to accommodate 9-car
VLocity trains, and a
train stabling yard near the station that would be able to house electric trains when they began to run on the line. On 4 May 2026, the Victorian Government announced that, in a dollar-for-dollar funding deal with the Australian Government, development works to support the future electrification of the Melton Line would be begun. ==Platforms, facilities and services==