Stable block at Llanharan House

The stable block at Llanharan House is a two-storey building with a basement on the west side, constructed of rubble stone and featuring a hipped slate roof. The roof has added brick stacks at the rear and skylights. The front wall faces south and consists of five bays with horned sash windows set under keyed heads, and small lunettes in the upper storey. The central gabled bay projects forward and includes external stone steps leading to a doorway topped by a keyed flat arch and a floating pediment supported by brackets. A 19th-century sundial is located in the gable. On the west side, there are two basement openings that were originally round-headed doorways but have been converted into windows.

At the rear, there is a taller two-stage stair tower that is offset to the right, topped with a hipped roof and featuring a plat band and a small stair light. A door and window on the left side of the stair tower are set beneath a single segmental arch. To the left of the stair tower is a round-headed doorway flanked by windows that have been renewed in their original segmental-headed openings, with loft doors further left under a gablet and above two small windows. Another segmental-headed window is located at the left end. To the right of the stair tower is an added loose box wing that has three small renewed windows. The west gable end of this wing, which is continuous with the wall between the house and the stable, features ball finials at the eaves and a carved running fox at the apex. An armorial tablet displaying the arms of John Blandy-Jenkins is set in the gable.

The interior has been converted for domestic use, with the basement containing two tunnel-vaulted rooms.