Cwmllethryd Fawr Farm

Cwmllethryd Fawr Farm is a farmhouse dating back to the 17th century, constructed of random rubble masonry with larger stones forming informal quoins. A significant feature is the large kitchen chimney incorporating a staircase on the east gable. A two-storey outshut on the south side of the east unit appears original, with a catslide roof extension that follows the main roofline.

The front and rear walls are limewashed, but the east gable with its chimney and the west gable, now rendered, are not. The roof is slate, with a small red-brick end-chimney at the west. Cast-iron rainwater goods are partially missing. Timber barge boards are present. The south elevation has one window above and two below to the west unit; the right-hand window has been blocked. The east unit also has one window above and two below, all modern replacements set within original openings, along with a small upper timber window in the front outshut. A modern door provides access. The rear elevation features a single upper window, also modern and in an original opening, to the right of a large stone buttress. The east elevation has a modern window to the staircase landing in an altered or reduced opening, and a smaller blocked window above which previously served the loft space; both have projecting hood stones. These windows are set within the projecting face of the chimney. A glazed enclosure at the rear door sits upon the dwarf wall of an earlier small yard.

19th-century extensions exist, including two cowsheds. One is located in a wing to the north, connected by a low linking block, the room in the link being a storeroom with slate cold slabs; it is constructed with limewashed rubble masonry and has an asbestos roof. The other cowshed stands in tandem to the west, also in limewashed rubble masonry and with a corrugated sheeting roof. The latter cowshed is now a milking parlour, with a concrete block shed added at one corner to house coolers. A lean-to former wash-house is positioned north of the house.

The farmhouse's internal plan is dominated by a cross passage, with a particularly massive wall, nearly one meter thick, on its west side, and by the large chimney of the original kitchen in the east unit. The east unit retains three chamfered beams supporting the chamber floor, one displaying a simple tongue-stop. The hearth of the chimney is now concealed, but a large bressummer remains in situ. To the left of the chimney is a stone staircase with winder steps and a quarter landing. The roof of this unit is supported by three pegged collar-beam trusses. The west unit has had a replacement floor, stairs and roof.