Hafod-arthen

Hafod-arthen is a 17th-century building constructed of rubble, rendered on the north and east sides, with the south gable whitewashed. It features slate roofs and has renewed stone chimneys at the center of the west house and the west gable of the east house. The west house has a five-bay lofted elevation, with a window, door, and window on the left side, and two casements towards the right end. While all windows in both houses were replaced in the 20th century, some retain 17th-century glazing, such as the north attic gable window with diamond mullions. The south gable includes an attic window. The east elevation of the west house has an intermediate lobby between both houses on the right, with a two-casement window to the left and a Velux window in the roof above. The south elevation of the east house has two bays with casements on the ground floor and two 20th-century dormer windows above. The junction building has a lower ridgeline and features an outshut porch with a steep catslide roof and a dormer above. The rear of the east house has a small window towards the center and two Velux lights above.

Originally, the west house included a chimney passage and a downslope byre, which has since been converted into a kitchen, with entry now leading laterally into the hall. An unheated inner room at the north end is separated from the hall by a post-and-panel partition, featuring stop-chamfered posts and chamfered Tudor-arched outer doors, with the eastern door blocked. The hall has closely-set beams with deep chamfers and slightly ogee stops. The fireplace features a timber bressumer, with the flue reversed for a stove in the kitchen. A chimney stair to the left of the fireplace is accessed through a timber Tudor-arched door. There is also a Tudor-arched doorway from the hall into the former byre (now the kitchen). The roof structure of the west house includes upper crucks with notched lapped collars and three sets of trenched purlins. The east house comprises a hall and a similarly-sized parlour, both heated, with closely-spaced joist beams that have deep chamfers and stops. A post-and-panel partition with a Tudor-arched head is located to the north, and like those in the west house, the posts have stops set high up. There is a chimney stair to the right of the fireplace.