Watermill to south-west of Stables including archway into mill yard and attached L-shaped range

This is a 2-storey watermill located to the south-west of the stables, built from local rubble and topped with a slate roof that features wide eaves. The mill has red brick dressings around camber-headed arches, including a central carriage arch on the north-west side, which is now infilled. The other openings are square-headed, fitted with 4-pane windows that have unusually thick frames; these likely originally included sliding ventilation shutters for the lower lights. The mill was powered by the Afon Llifon, which supplied water to an overshot waterwheel at the south-west end. While the wheel remains in place, its buckets are missing. The wheel-pit is partly covered by a later sawmill lean-to that is attached beyond. The machinery is still present, along with a reused cast-iron Ionic column similar to those found in the kitchen courtyard at the back of the house. The south-east side features skylights and similar architectural details. At the upper end, there is an added turbine house, which is a broad, slate-hung, gabled cross-range with a diamond leaded window. This section includes a further gabled projection that provides a first-floor entrance, accessible via a footbridge over the yard. The north-east end has a deep lean-to, with a roof that nearly reaches the higher ground level of the adjacent drive and includes skylights; this lean-to wraps around the corner and extends along the north-west side, featuring a boarded door with a latticed overlight.

Adjoining the watermill is a gently pointed archway that connects it to an adjacent ancillary range. The brick arch is set into a rubble wall. On the west side of this wall, there is a lean-to with a 2-light window and a boarded door, along with a red-brick chimney. On the opposite side, there is a similar lean-to and an attached high screen wall with coping that extends north toward the drive.

Despite some conversion, machinery remains at the south-west end, including a spur wheel and the main drive. A modern staircase leads to the upper floor, where one stone with its own horse and hopper survives, along with a relocated dresser. The roof features queen-post trusses and consists of 5 bays, with slate flagged floors. The turbine house at the rear includes an upper floor that served as the Battery Room, and there are modern partitions throughout.