Former Llanbradach Colliery winding engine house

A tall gabled structure built into the hillside and oriented to the former shaft below to the E. Of coursed rock-faced sandstone and replaced tile roof behind coped gables. The downhill (E) gable end, facing the former shaft, has a tall blocked opening designed for the winding cables, under a keyed segmental arch and flanked by buttresses, with inserted windows to the L and R. In the S wall is an added lean-to to the R, to the L of which are 3 segmental-headed windows in the upper storey with original iron-frame glazing to centre and R. Similar ground-floor openings have now been altered by insertion of doorways, but an original doorway at the L end has replaced double doors. The 4-window N wall has similar openings to the S, some of which are blocked. The uphill (W) gable end has a Diocletian window part cut through to make a doorway from road level to the upper storey. Beneath it is an added projection.

The interior has been subdivided into workshops and offices.