Llwyn Onn Isaf Farmhouse

Llwyn Onn Isaf Farmhouse is a vernacular farmhouse dating from the 17th century, featuring two storeys. It is constructed of rubble with a slate roof, which is currently being re-laid. The farmhouse has end chimneys, with the left chimney currently being rebuilt and finished with weather coursing. The gable ends have parapets with kneelers. The front of the house has a broad two-window layout with a central entrance and notably long quoin stones. The plinth is partly made of boulder stone and the gable ends are slightly battered. The right-hand windows are offset, and there is a part-glazed door. An inscription on the lintel reads: 'RW 1689 EH'. A small square stair light is located on the upper left gable, and there is a window on the right gable, which is located above a newly created entrance that was formerly a 12-pane sash window. The rear features a 16-pane recessed sash window.

Attached to the left gable end is a lower, later rubble cross-range. At the junction of this cross-range, there is a window opening that was previously a boarded door, and beneath it, steps lead down to a cellar, which has a deeply-recessed boarded door. There is also a drystone outshut at the far end of the building.

At the time of inspection in Autumn 1994, the house was undergoing extensive restoration. Inside, the left ground-floor room, which was formerly a parlour, features a stop-chamfered beamed ceiling with tongue stops. The end beam above a plastered-over inglenook fireplace is supported by three rough stone corbels, with a later addition of a bread oven. The hall to the right has been subdivided in the late 19th century to create an entrance passage, and there is evidence of a similar ceiling. The upper floor has stopped-chamfered main beams, and in the front-facing room, there is a wall cupboard with plain pegged oak doors and iron butterfly hinges. At the south gable end, an original stone newel stair provides access from the first floor to the attic. The roof is a four-bay structure with original pegged collar trusses.