College

This building is a college constructed in the Tudor style, featuring coursed slate rubble with ashlar quoins and steep-pitched slate roofs. It has a T-plan layout with an ashlar entrance tower at the angle. The west cross-wing serves as a high single-storey courtroom, while the south-facing range is domestic, comprising one and a half storeys. The roof pitches on the west and south sides display decorative banding and lozenges made from cut slates, with gables that have moulded slate corbels and ridged slate coping. There are two large ashlar stacks on the south-facing range, one located on the ridge behind the courtroom and the other at the eastern end.

Inside the courtroom, there is an ashlar plinth and on the west side, two re-used 17th-century three-light mullion and transom windows with recessed chamfered mouldings, although they appear to be reset upside down. The window heads and hoodmoulds are from the 19th century. Above these windows, there are two large coped and shouldered gables featuring narrow ashlar loops. The north end wall is plain, while the south end has a 19th-century timber mullion and transom window with a cambered stone head and hoodmould, along with a blank plaque above. The southeast angle, adjacent to the entry tower, shows a straight joint with no quoins. The tower itself has a similar plinth, a chamfered Tudor-arched doorway with a plank door and a Tudor-arched hoodmould. It features a diagonal two-step buttress at the southeast angle and a flat parapet with angled coping. Above the door, there are three plaques inscribed with '1626', '1852', and 'Llys-du Arglwydd Cemmaes'. The east face of the tower includes a small lower light and an incised cross above.

The domestic wing contains one timber cross-window and an eaves-breaking four-pane sash window in the stone gable, both of which are ashlar-framed with slate sills. The eastern end has a plank door within a timber porch. There is a small 20th-century addition at the rear on the left and a one-window range on the right that breaks the eaves.

The courtroom features a high scissor-rafter roof and an eastern wall fireplace with a sloping corbelled stone hood. The domestic wing includes a large eastern end fireplace with an ashlar southern pier. Each floor has two rooms and a single flight of stairs located on the rear wall.