Llanfythin Mill

Llanfythin Mill comprises a cottage range, a three-storey mill range, and a 17th-century dairy room. The cottage range is constructed of lime-washed rubble with a slate roof, featuring two rendered stacks. The southwest gable end has two timber casements, one at ground floor and one at first floor. The east elevation contains two first-floor windows, and a gabled dormer breaking the eaves, with a hollow chamfered hoodmould and multi-paned two-light casements. A small timber two-light casement is located at the first floor to the west end. The western bay appears to be a later 19th-century addition. At ground floor, there are two casements: a two-light, multi-paned casement in an original opening beneath a hoodmould with a relieving arch, and a modern three-light casement in a modified opening. A modern doorway is present at the west end, and a second door with a hoodmould is located at the east end, now fitted with a modern glazed door. The northwest elevation has no windows.

The three-storey mill range, set at right angles to the cottage, has four multi-paned casements on the northwest elevation, arranged asymmetrically. A modern glazed door is also present. The front (east) elevation is painted white and contains a modern ground-floor bay with a two-light, multi-paned casement above. A projecting gabled canopy shelters a loft door opening, now glazed. The northeast elevation includes a single window to the ground floor, two on the first floor, and one on the third. The rear northeast elevation of the gabled mill house range retains an iron overshot water wheel with timber paddles and a wrought iron superstructure, noted as being in poor condition in April 1995.

The 17th-century dairy room is located at the southwest end and adjoins a 17th-century range. A hall cell features an open fire with a stone lintel, and a later timber fire surround. A direct entry stone stair is situated to the north side of the fire, with an original square-headed planked door and frame featuring an early fleur-de-lis pintel hinge. Three exposed beams with a medium chamfer and hollow stops with fillet are present, along with plain chamfered joists. A flagged floor is now concealed. Original planked doors retain a plain chamfer to the jambs, also with hollow stops. A northeast room contains a large open fire at the southwest end, with a 20th-century bressumer. A 19th-century oven is located in the north jamb. The ceiling is also of later 19th-century date. A straight flight, modern stair is located at the northeast end, with a surviving mill wheel positioned beneath the staircase. This leads into the original mill room, which contains extensive surviving mill machinery, including an axletree leading from the water wheel, a pit wheel, a wallower, and a spur wheel attached to the main shaft, along with a gear lever. The first floor shows exposed principal rafters with trenched purlins, as well as evidence that the eaves were raised at some point.