Pig Sty, Ty Bach and Associated Walls at Tynyllwyn

The structure is a pig sty, along with associated walls, located at Tynyllwyn. It features a rectangular paved enclosure that is oriented east to west, with a projection on the southwest side. The enclosure is surrounded by rubble stone walls topped with stone-slab coping. There is a gateway in the west wall that leads to stone steps at the southwest corner. Inside the enclosure, there is a large stone drinking trough situated on the northwest side. At the eastern end of the enclosure, there is a lean-to pig sty with a stone tile roof, which includes a doorway in the west side wall that leads into a small walled pen. The projection on the southwest side contains a ty bach, which has a lintelled doorway and a pent roof made of stone tiles.