Former Llandbradach Colliery workshops range

Consisting of 3 gabled ranges connected end-to-end by short links. The range at the N end is larger and higher and is the earliest. It is 11x3 bays, of rock-faced, snecked sandstone with coped gables and corrugated iron roof. The windows are segmental headed and have iron-frame glazing with blockwork infill behind. In the W side wall a wide doorway is cut in to the 2 northernmost bays and a loading bay is cut into the central bay. At the S end are 3 small basement windows. (A 2-span projection is added to the N end.)

The middle range is rubble stone with brick dressings and corrugated metal roof. It has, on the W side, a wide doorway cut into the N end and an added lean-to. In its 6-bay E wall are segmental-headed windows with iron-frame glazing. The S range is offset to E side of the middle range, is also of rubble stone with corrugated metal roof, of 8x3 bays with openings under brick segmental heads, and has a raised platform around it. In the E wall one window is converted to a doorway. In the W wall a wide doorway is inserted into the 2 bays at the S end, while the other windows are blocked. In the S gable end are also blocked windows, the window to L cut down to ground level.

The N range only was inspected and has wrought iron roof trusses similar to the engine hall and engineering shops.