Cefn-y-buarddau, with front yard walls

Cefn-y-buarddau is a former dwelling and farm building that is aligned and faces northwest towards the sea. The structure is built of rubble stone on boulder foundations and is thinly rendered and whitewashed. The dwelling section has old grouted slates, while the farm building features later slate roofing. It is one storey high with attics, comprising a living kitchen and an inner room, along with an attached farm building that was likely originally a cowhouse, and a narrower stable connected to the upper gable end.

The front elevation displays a central stable door flanked by projecting stones, with small square windows on either side. There are large gable-end stacks that have projecting weather courses. The upper floor features two small raised gabled dormers positioned directly above the ground floor windows. The cowhouse, which is contemporary but not interconnected with the main dwelling, has a stable door at the front and a brick addition at the rear, along with a small gable-end window. The stable or washhouse may be a later addition and includes a brick lean-to structure at the gable end.

Access to the entire length of the house is provided by a path that runs along the front, elevated above the yard, which is enclosed by boulder walls. The building was not accessible during the inspection. Reports from the Royal Commission on the Ancient and Historical Monuments of Wales mention two chamfered cross beams, with the more southerly beam located to the right of the door, indicating the line of a removed partition to the inner room. There is also a large stack that is partially blocked, featuring a cambered fire beam above it, and a square recess with a small window on the north gable end, which may have originally served as the stairway.