Yr Efail

Yr Efail is an asymmetrical, two-storey, three-window house. It was likely constructed in the 18th century and is built of lime-washed random stone, with a slate roof and a stone end stack on the left side. A former stack on the right side is now missing. The front elevation features a boarded entrance door, sheltered by a slate-hung lintel, located to the left of the centre. There are windows to the left and right, with a third window set far to the right. These are primarily two-light wooden casement windows with small-pane glazing. The lower storey windows have slate-hung lintels, some of which are missing slates, and the upper storey windows are aligned immediately below the eaves. The rear of the house has a boarded entrance door to the left of centre, which historically served as the entrance to a second cottage. To its right is a four-pane wooden window with a timber lintel. Towards the centre, a small two-light wooden casement window provides light to a service room. A former single-storey smithy is attached to the left end, with split doors on its front to the right, a window opening to the left, a small opening in the gable, and a rear doorway.

The front entrance leads into the left-hand unit, which was originally the living room of the left cottage. This room contains a large stone fireplace with a cambered timber lintel. A winding timber staircase is built into the left side of the fireplace. The ceiling has a shallow-chamfered spine beam and plain joists, which appear to be a later addition than the fireplace. To the right is a partition separating the service rooms, featuring panels of woven oak laths and two planked doors. The service rooms were originally divided axially, with evidence of the original sockets still visible. The living room of the former right-hand cottage has a stone fireplace with a long, narrow timber lintel, and a bake oven recessed into the right-hand reveal. A winding timber staircase is positioned on its left side, and a planked door led into a rear service room. This room also has a ceiling featuring a shallow-chamfered spine beam.

The upper storey is accessible via the left-hand staircase. The original roof structure comprised cruck trusses, which were later replaced with tie-beam trusses when the house was raised. The cruck blades remain above the tie-beams and retain sockets that once held the original purlins. New rafters and purlins were added to the outer sides of these blades. The partitions beneath the trusses are largely constructed of small-scantling timber framing and appear to be of a later date.