Ynyswen

Ynyswen is a 2½-storey house with a basement, built in 1718. It comprises a three-window main range with a rear wing to the right and an outshut. The house is constructed of rubble stone with a slate roof, featuring a central gabled dormer and skylights. The main range has roughcast gable stacks, while the rear wing has an end stack.

The front elevation features a wide, half-glazed entrance door flanked by canted bay windows with two-pane sashes, connected by a lean-to canopy supported by wooden posts. Above the entrance is a slate tablet inscribed 'built at the charge of Thomas Lewis 1718'. Late 19th-century margin-lit two-pane sashes are set within original openings under wooden lintels on the upper storey. Exposed ends of inserted cross beams are visible internally. The left-hand gable end stack is battered at its base and has a lean-to addition on its right side. To the left of the stack are mid-20th century inserted windows and a replaced attic window.

The rear wing, aligned with the gable end, features a mid-19th century tripartite twelve-pane sash window in the lower storey and a simpler twelve-pane sash window in the upper storey. A late 19th-century sash window, positioned at an intermediate level to light the landing of the main stair, is present on the left side, with a replaced window below it illuminating the basement stair. The basement window to the right has been enlarged. The rear gable end is slate-hung, except for the basement, which has a replaced window.

The added catslide-roofed outshut, located further to the right, has a replaced segmental-headed window in its gable end. Its side wall, at basement level of the main house, has windows and a door replaced within original openings.

Inside, the entrance hall has a late 19th-century quarry-tile floor. The kitchen to the left has a flagged floor and a replaced lintel over the fireplace. Cross beams are formed from re-used timber. The main, full-height dog-leg stair is located within the rear wing and features turned newels and plain balusters, likely dating from the 18th century. A second parlour, added to the rear wing, has panelled reveals and a neo-classical round-headed niche with fluted pilasters incorporated into what was formerly a doorway. The dog-leg stair to the cellar has a combination of oak and slate treads. The outshut’s basement contains a large fireplace with a replaced lintel, and a bread oven. The roofs of the main range and rear wing are supported by pegged trusses; one truss in the main range bears a date of 1831.