Penlan-hafodwen including attached byre (also known as Penlan-capel)

Penlan-hafodwen, also known as Penlan-capel, is a 17th-century building featuring rubble construction with cob on the upper front walls. It has a rough plinth, and while the byre is whitewashed, the house is painted, reflecting a typical upland practice of the time. The roof is covered with corrugated iron over thatch, and there are rubble gable chimney-stacks, which are thicker on the left side. The house has a three-bay front that is offset to the right, with two upper 20th-century steel windows that rise to the close eaves. The ground floor features small 4-pane horned sash windows with timber lintels, and a central door within a simple added porch. There is a small blocked window to the left at mid-storey level that once served a former stair. The right end of the building is rubble with an open garage attached. At the rear, there is a later rubble outshut that has a two-light 4-pane casement window facing east. The northeast corner of the house is bullnosed, while the front has quoin-stones.

The byre is located at the left (downslope) end of the building. Its upper walls and gable are made of cob, and there is a boarded door to the right that was once a cross-passage entry. Three small windows are located to the left, with the one at the end being an insertion, all featuring timber lintels. The gable end has a divided boarded door with a timber lintel, and there is a loop to the rear. The cross-passage does not have a rear exit door.

Inside, the kitchen, which is the left room, has a massive rough beam and sawn joists. The original roof structure is intact, consisting of three pairs of scarfed crucks with rough pegged collars and paired purlins. The thatch and scantling underthatch are fully visible. The cross-passage door has been blocked; it once led into the kitchen beneath the stair, which has been replaced with a single flight. The byre also features three pairs of scarfed crucks, pegged collars, and paired purlins, with the thatch and scantlings remaining complete. A portion of a planked partition survives, which divides off the cross-passage and may be original.