Plas Tirion

Plas Tirion is a house, originally a short 4-bay range aligned roughly north-south, with later additions forming an H-plan configuration of two storeys to the front (west). The construction is of roughly coursed rubblestone, formerly rendered to the front, with extensive traces of limewash remaining on the rear elevation. The roofs are slate, with moulded coping to the parapet and projecting gables on the front.

The front elevation is arranged in a 1:4:1 bay pattern. The windows are early 19th-century Gothick sashes, featuring stained glass heads and slate sills. The first floor has paired windows of 24 panes to the centre, while the gables have wider windows of 36 panes. The ground floor of the gables has triple sashes of 81 panes. The central range incorporates a slate-slab roofed verandah supported by five cast-iron columns. The left (north) bays have 36-paned sashes, the fourth bay has a narrow 12-paned window as a side light to a Tudor-arched doorway with spandrels. The right (south) gable includes a dummy cross-shaped gun-loop to the apex. The central range has two late 20th century rooflights behind the parapet to the left, and a rendered ridge stack to the right. The blank gable ends feature substantial integral stacks with rendered shafts.

The asymmetrical rear elevation includes a 20-paned sash to the first floor and a 24-paned sash to the ground floor of the left gable. A section to the right has a tall multi-paned latticed staircase window high in the wall to the left, and four-paned sashes on each floor to the right, connecting to the right gable, which itself has four-paned sashes on the main floors, with a small two-paned sash window to the attic. The return of the gable features a 12-paned sash on the first floor in the angle, with a full-height lean-to projection to the right, incorporating a four-paned window at the upper level. A late 20th-century flat-roofed porch, approached by steps, projects in the angle between the gable and the main range/lean-to, with a 20th-century casement window on each floor to its right.

The largely early 19th-century interior features a stone flag entrance hall to the right (south) of the ridge stack, with a moulded plaster cornice and panelled reveals to a tall staircase window. The staircase, dating from approximately 1800, is of a dog-leg type but cantilevered across the window. It has a plain moulded handrail with a clustered bottom newel and stick balusters, two to each carved tread. A room to the right has a moulded cornice and picture rail, a boarded floor, and a carved slate fireplace (circa 1890). A small room is located behind this. The room to the left (north) of the entrance hall is likely the 16th-century parlour with a cornice and two boxed cross beams. A corridor behind incorporates a nail-studded plank door and a straight-flight staircase with turned balusters to the first floor, continuing as an enclosed staircase to the attic. The attic displays two massive A-frame trusses visible to the original short main range and king-post trusses to the 19th-century additions. Extensive cellars to the north end of the house have slate floors, a large slate-slab water tank, and a massive fireplace with a plain slate-slab surround to the end stack; this part of the cellar was formerly the kitchen.