Tyn-y-Celyn

Tyn-y-Celyn is a farmhouse dating from the 18th century. It is a symmetrical three-window, two-storey and attic building constructed of rubble with a slate roof, gable parapets, and tall end chimneys featuring plain capping and weather-coursing. A distinctive central gable is shaped like a pediment and contains a six-pane oculus, a characteristic detail of the area; a stone spout is positioned to the right. Massive stone lintels are above sixteen-pane sash windows, and a continuous cill forms a band beneath the first-floor windows. A verandah formerly existed at the front. An inscribed slate date plaque is located centrally above a modern twelve-pane glazed door.

The right gable has an attic casement window and a small-pane window above a modern rubble porch. A single-window cross-range extends beyond, featuring four-pane casement windows and twelve-pane and nine-pane sashes. A lower, 19th-century cross-wing is set into the slope at the left end, and angled to the original house; it is constructed similarly, including a boulder plinth to the rear. This wing diminishes in height towards the rear, resulting in the left-hand windows being stepped up. The first floor predominantly features four-pane sash windows.

The main entrance has been relocated from the front to the right-hand side. The main ground-floor rooms retain Georgian detailing, including six-panel doors and panelled shutters. The drawing room has architraves with bosses, and the dining room features plain arched recesses. The original dog-leg staircase has a swept-up handrail, shaped tread-ends, and turned balusters. The roof structure incorporates twin purlin trusses that are pegged.