Cwm Mawr Farmhouse

Cwm Mawr Farmhouse is a whitewashed rubble farmhouse with slate roofs and stone end chimney stacks, featuring renewed leaded casement glazing. The earlier section of the house is located uphill and has three windows on the east-facing front, along with an added gabled porch. The later phase of the building is a tall two-storey and attic block that includes a large stair projection and a pair of diagonally set chimney stacks on the downhill gable end, with renewed four-light windows in the principal rooms. There is also a blocked doorway.

The best-preserved part of the house is the 17th-century addition, which fits into what Fox and Raglan describe as the 'Reserved Chamfer Phase'. It features a fine stone fireplace in the former hall with stop-chamfered jambs and a split lintel, while another fireplace retains an adjacent spice cupboard. The ceiling has sunk-chamfered and Wern Hir stopped beams, and unusually, diagonally set cross beams in the former cross passage; the screens partition has been removed.

The staircase tower includes an impressive square stairwell with stone flights leading up to the Great Chamber and down to the cellar. The presence of a stone staircase suggests that this enlargement occurred earlier in the 17th century, rather than later when oak staircases became more common in similar houses. The stair tower features a deeply splayed recess where a former window was located, as well as another deeply splayed lancet at the base, now illuminating a bathroom. A secondary staircase leads from the Great Chamber to the attic.

Notable interior features include ornate doorheads with ogee and double roll-mouldings, with one located in the Great Chamber and another unusually found in the attic, apparently in its original position. The 17th-century roof consists of three bays with pegged A-frame trusses, tenoned collars, and two tiers of trenched purlins; one attic window has a reeded surround to its splay. The earlier part of the house has upper-cruck trusses but has been largely altered otherwise.