Former Stable Block at Plas-yn-Cefn

The former Stable Block at Plas-yn-Cefn is a large, rectangular, two-storey building dating from the 18th century. Constructed of local limestone rubble, it is roofed with slate and features original kneelered and stepped gable parapets. The northwest side of the building faces the main yard, with its ground floor set below yard level, accessed by a wooden bridge and a flight of stone steps leading down to a narrow passage. An entrance door with boarded upper and lower sections is flanked by two nine-pane sash windows; the right-hand window fills a wider opening that retains visible fragments of a previous, massive stone entrance with a partially visible relieving arch. The upper floor is reached via the wooden bridge. To the right are two large 19th-century nine-pane sash windows with projecting, tooled limestone architraves and chamfered reveals. To the left are three eight-pane sliding sash windows. The southeast side faces a smaller, cobbled courtyard and has a boarded door, a 19th-century nine-pane sash window with a cambered head, and two modern windows alongside a 19th-century eight-pane sliding sash. Several earlier blocked openings are visible, including a former main entrance and later ventilation slits. The northeast gable displays two fine, blocked, large stone entrances with flat heads, and a blocked primary window above with a large exposed lintel.

A large, octagonal clock tower, dating from circa 1900, sits above the roof. It is a copy of an earlier 18th-century clock tower that formerly stood on the laundry block and is constructed of timber with a slate-clad lower section and slatted upper section; it has a deeply moulded eaves and exposed rafter ends. The tower is topped with a lead ball finial and a decorative iron weathervane bearing the initials “W-W”.

A smaller extension, dating from circa 1900, adjoins the main block to the east, creating an "L" shape. It has a mono-pitched slate roof, a boarded entrance and another boarded door. Steps lead down to a lower level of a cobbled courtyard from the laundry block.

The ground floor contains 19th-century loose boxes. The upper floor has a large room at the southwest end, formerly the estate office and now used as a hunt meeting room. This room features a Tudor-arched stone fireplace, with reveals that have hollow stopped-chamfered detail and carved guilloche decoration to the spandrels. The fireplace includes the date 1694 in a raised shield, and the initials “IP”.