The Newcastle Signal Box is part of the Newcastle Railway Station precinct , which has state-level heritage significance. The site showcases nineteenth century Victorian railway precinct based on the design approach of British engineers, John Whitton and Matthew Mason. Constructed in 1936, the Newcastle Signal Box internal equipment prevails highly intact, and demonstrates the remarkable technical innovations introduced at the time of its design.

The key innovation of the Signal Box was the use of electro-neumatic levers to switch the tracks, using compressed air to manipulate the switching gear. This was hit – tech at the time, and the Newcastle Signal Box remained operational until 2014, when it was decommissioned as the last remaining signal box of its type.