Barn and attached ranges at Aberduhonw

The building at Aberduhonw consists of a barn, hay-barn, and lofted cowhouse, constructed from rubble stone and topped with slate roofs. The barn and hay-barn are positioned along the roadside, with the hay-barn featuring larger slates. The rear range has a lower roof that extends back from the main structure.

The hay-barn, located to the right, showcases impressive open side elevations with three large round arches made of stone voussoirs, supported by two square piers. The central arch is wider and taller than the two side arches. One side arch connects to the end of the barn, while the other arch features a broad corner pier leading to the end gable, which is covered with a tin sheet.

To the left, the barn has double doors facing the roadside, adorned with tooled stone voussoirs and a keystone above a broad arch, along with a pent roof. There are two loops on the left side, one loop on the right, and an additional loop within a boarded lean-to that has a slate roof extending from the main roof, with a rubble stone wall on the right side. The loops are separated by a crossing stone at mid-height. The left end wall displays two large loops beneath two smaller loops in the gable. The rear of the barn, facing the courtyard, mirrors this design, featuring stone voussoirs at the barn opening, two loops on the right, and the left side obscured by the attached lofted range.

The lofted range has a front wall made of rubble stone with some horizontal boarding, and it includes two large gabled dormers with boarded square openings. The right side consists of a stone end, followed by a boarded section with a window, and then the main part of the rubble stone featuring five doors with timber lintels. Rubble stone is present at loft level only above the first door and between the third and fifth doors, with boarding at loft level elsewhere.

Attached to the main structure is a single-storey L-plan range with slate roofs and an open front supported by oak posts, consisting of six bays and a two-bay return. The rear wall is made of rubble stone.

The hay-barn features a four-bay double-purlin roof supported by tie-beam trusses with thin angled struts. The barn has tie-beam trusses with angled struts and bolted iron centre rods, with blocked loops at the end where the hay-barn has been added, and a loft opening above. There is also an opening leading into the loft of the rear range, which contains a rear feed passage, heavy beams, and tie-beam-and-collar trusses in the roof. Weatherboarding covers the heavy oak framing at the loft level.