Plas Penmynydd

Plas Penmynydd is a two-storey farmhouse with attics, originally built in 1576, with later additions to the rear (south). The north block represents the extent of the original house. The building is constructed of rendered and slate-clad stone, with a roof of old small slates. A tall, gabled chimney with moulded capping, built of coursed gritstone with chamfered offsets, is a notable feature of the south elevation and retains 17th-century character. The original north doorway is partially blocked, featuring a window above; the stone step and four-centred rear arch remain. Above the doorway is a stone cross shaft, flanked by two stones, one bearing the Tudor arms (16th century), and the other a Saracen's head. Two inscribed stones are set into the rear (south) wall of the late 17th-century kitchen extension: one reads "PERACTV EST OPVS LAVS DEO," and the other “VIVE VT VIVAS ANNO DOMINI”. A stone bearing the date and initials "1576 R.O.T." is set into a modern wall on the west side. Sash windows with glazing bars, some recessed with visible frames, are present throughout. The entrance door has six fielded panels and a rectangular fan with glazing bars.

The original house (north block) was rebuilt in the mid 17th century, with a ground plan consisting of a central living room or kitchen flanked by rooms on either side. The staircase is located to the right (west) of the central room, either leading directly out of the room or from a screened passage. The original Elizabethan Hall fireplace, with a four-centred arch and double roll-moulding continued on the jambs, has been retained and is now situated in the sitting room. This room also retains three 17th-century chamfered oak beams with moulded stops, which support the ceiling. A 16th-century stone corbel carved with a human face, likely in situ, supports the central beam at the north end as a remnant of the Hall roof truss. The partition between the Hall and the room to the east is a 17th-century division, constructed of plain rails with roughly bevelled panels. A further partition between the staircase passage and the room to the west also marks a 17th-century division. Two chamfered beams are visible on the first floor. The late 17th-century kitchen features a stop-chamfered cross-beam and an oak beam over the fireplace. The roof of the north block is 17th-century. The pitch was later flattened by raising the lower purlins, and some 17th-century panelling is fixed beneath one of the trusses.