Cefnllyfnog Farmhouse

Cefnllyfnog Farmhouse is a timber-framed house that features a main range oriented north to south and a crosswing at the southern end. The main range has timber framing on the east side, with the northernmost bay consisting of two panels high, while the rest of the timber framing has been partly replaced with stone or brickwork. On the west side, there is a deep wallplate, but the wall below has been rebuilt, which includes two walled-up door positions. The main entrance, which has a hood, is located on the east side opposite the main chimney. There are timber replacement windows on either side of the door, each with glazing bars, and one cast-iron small-pane window on the west side.

The crosswing retains timber framing on the front (east) and side (south), while its rear is constructed of stone and heightened with red brickwork, featuring brick quoins. The house has steep slate roofs and a pair of ribbed chimneys made of red brickwork on the main range. There is a small modern extension with a lower pitch added to the north of the main range. The timber framing on the front gable of the crosswing is particularly notable, displaying a slight jetty at the first floor and at the base of the gable. The ground storey features close-studding with mid-height timber, and the first storey has herringbone decorative bracing beneath the window, along with cusped quadrant bracing in the gable, which is made up of small panelling four panels high. On the left side (south), both the ground and first storeys are constructed with close studding two panels high.

On the east front of the crosswing, there is a 12-pane hornless sash window at the ground storey and small timber windows with glazing bars above, which respect the openings of the timber framing. On the south side of the crosswing, there is a 12-pane hornless sash window that partially fills an original window opening, along with three smaller timber windows that also have glazing bars.

Originally a hall house, the building has been converted to a lobby-entrance plan type. Although the interior was not inspected in 2003, it is reported to contain significant features in the hall range, including a mid truss with arch bracing and cusped struts, as well as a post and panel canopied dais partition. A roasting spit at the main hearth is dated 'Richard Hughes esq., 1771'.