Rhyswg Fawr Farmhouse and walled forecourt

Rhyswg Fawr Farmhouse is a long farmhouse that includes a former byre. It is constructed of limewashed rubble and features a steep felted roof, which was previously stone tiled. The roof has an end stack on the right and a corbelled chimney on the left, with a massive centre ridge stack that has since been replaced. The building has a two-unit plan, with the older unit on the left and a rear outshut built into the hillside. It is a single storey with an attic.

On the left side, there are three casement windows on the ground floor, with the right window featuring a timber lintel. The centre window is likely a former doorway with a stone hood, while the left window has a shallow stone hood and sill. Above, there is a gabled dormer and a small window with a stone hood next to the corbelled fireplace on the gable end. A wide central flat-roofed porch spans the two units, showcasing large quoins and voussoirs around the doorway, which has a boarded door. There is also an earlier small side window with a hood. A renewed window on the ground floor to the right has two 6-pane casements that rise through the eaves above, positioned at a different level from the left unit. The rear features a catslide roof over the single-storey outshut, which has casement windows. The shallow walled forecourt includes a trigonometrical point on one of the gate piers, complete with an attached mounting block.

Inside, the farmhouse retains a cross passage that runs outside the fireplace gable of the original dwelling on the left, leading to a hall with a wide segmental arched doorway. The hall features heavy chamfered and stopped beams, along with close-set chamfered and stopped joists, all marked with carpenter's numbers. A spiral stone staircase rises to the left of the open fireplace, which includes a bread oven. Opposite the fireplace is a post and panel screen with two doorways that once led to a buttery and pantry, though the heads of these doorways are now lost. The farmhouse roof consists of an upper-cruck truss with a block apex and notched collars, while the former byre has an A-frame roof with a raised collar. The later outshut contains a dairy and kitchen.