Llwyn-du

Llwyn-du is a country house featuring stucco exterior, a hipped slate roof, and rendered brick chimneys, with one chimney at each end and one off-centre on the main ridge. The eaves project and are supported by cyma-moulded brackets. The southwest front is two-storey with six windows, showcasing 12-pane sash windows that have stucco hoodmoulds. The ground floor has a glazed door in the third bay, which may have replaced a window. The right end wall is rendered and windowless to the left, with a door in an added glazed porch to the right on the side wall of the rear wing, and a sash window to the right of the porch featuring Gothic glazing bars. Above, there are two sashes with marginal glazing bars. The left end wall is roughcast with a small lean-to addition behind a crenellated southwest wall. There is one ground floor window with Gothic glazing bars left of centre and a 12-pane sash window on the first floor to the left.

The rear of the house has broad projecting hipped wings on each side and a recessed hipped projection in the centre, which is presumably the original stair tower. The left wing is windowless and has an end stack. The recessed centre gable features an added glazed lean-to below and a large sash window above, flanked by smaller sashes. The right wing has a 12-pane sash window at mid-height on the left, lighting the present stair, and a sash window with Gothic glazing bars on the ground floor to the right.

Extending from the southeast corner is an L-plan range of single-storey outbuildings, with a short section running southeast and a range with three doors running northeast, featuring a truncated stack at the southwest end. This range is roughcast and was formerly whitewashed.

The interior has a spine corridor plan with principal rooms to the southwest and the staircase located to the northeast. The staircase, dating from the late 19th century, has a ball-finial on the turned newel, and there is some later 19th-century tiling in the corridor. The doors are six-panel, and there are some floral plaster ceiling borders.