Pen-Rhos Engine House

Pen-Rhos Engine House is a tall beam engine house with battered walls made of rough rubble, featuring dressed stone quoins and dressings. The building is roofless but has moulded kneelers at the gable copings and brick stacks on both gable ends, which were added when the structure was converted into a dwelling. There is a beam arch high in the south gable's bob-wall, which is partially blocked to create a domestic window; this arch is semi-circular and made with dressed stone voussoirs. A small doorway is located to the lower right of this gable. Additionally, there are remains of what may have been a square stack to the east.