Jointly constructed from 1902 to an enlarged standard LNWR design of 1876, the three storey structure is built of two storeys of red brick and cement, with a third floor mainly of wooden weather board pin-panel containing the glass windows, all topped by a Welsh slate pitched roof. Access is via a door on the rear, with the lower two floors housing interlocking signalling equipment accessed via two internal wooden staircases. The main operational floor houses a 180 lever interlocked frame, divided into two sections: Abbey Foregate to Sutton Bridge; Shrewsbury station to Crewe Junction.