Outbuilding with attached Horse Engine House in Farmyard to NE of Crug-Glas

This is an early 19th century single-storey outbuilding, originally a barn, constructed from rubble stone and featuring a grouted slate roof that has been patched with corrugated iron. The front wall includes a door with a cambered brick head positioned to the left of centre, along with a window to the left. There is a loft window at the north end and a nine-bay collar-truss roof.

Attached to the rear, and added later in the 19th century, is a rare horse-engine house. This structure is five-sided, made of rubble stone, and has a grouted slate roof. The three sides facing the rear yard were originally open and supported by round stone piers, although two sides have been infilled with stone and one with corrugated iron. Inside, there is a massive timber centre beam with a kingpost, and some remnants of an iron shaft extend through to the barn.