The Cwm, Front Terrace and Retaining Wall to South-West

This is a shooting box, later adapted into a farmhouse, dating to the 1830s. It was built on the site of, and incorporates parts of, a demolished 17th-century house. The construction is primarily squared sandstone rubble with ashlar dressings, topped with a low-pitched hipped slate roof with wide eaves. The building is roughly T-shaped, facing south, with two extensions to the west; one is a surviving section of the earlier 17th-century house, and the other is a long kitchen range added to the north-west.

The front elevation has an informal arrangement, with a two-window by three-window layout. It features glazing bar sash windows, two of the left-hand windows set within a hipped break, and a blank window on the first floor to the right. A stuccoed portico, with fluted Doric columns in antis, provides access and features an arched doorway with a plain fanlight above a panelled door. A shaped bay window is on the right-hand return, and a lower, possibly late 18th-century rear range incorporates an arched stair window.

To the left of the front, a significant portion of the earlier house remains as a single-storey-and-attic cottage. This section has been stone-clad and has two gabled half-dormers with Gothic glazing and doorway to the front. A three-light wood-mullioned window, with ovolo-moulded details (lacking glass grooves), survives at the rear. Internally, there are two pairs of upper crucks, originally with a collar purlin. Evidence of a former newel stair is near a large fireplace. The masonry is a secondary cladding. Other interior features include heavy cross-beams and chamfered joists. The ground rises steeply to the west, and there is a gable entry to the first floor.

The site has historical significance as the former headquarters of a Jesuit Mission in South Wales, established by 1600 and operating clandestinely. It was raided and disbanded in 1678 following the Titus Oates Plot.

Attached to the south-west corner of the earlier house section is a short retaining wall, approximately 10 yards long and 14 feet high to the base, featuring bee-boles on its north-west side. A broad terrace in front of the house was added to create a more formal appearance.