Plas Glan-yr-Afon

Fine interior has many fixtures and fittings surviving from the mid-C18 remodelling, including the staircase rising in straight flights from the panelled hall to the similarly panelled landing and thence to the attic; ramped square newels, elegant turned balusters (2 to each tread), closed moulded string with scotia decoration to the treads and moulded handrail. Interestingly, there is no diminution in status as the staircase rises, save that at attic level the balustrade is solid with raised panels. The contemporary panelling to hall, landing and 3 principal bedrooms (to the west of the staircase, in the northern block and at the southern end of the north-south range) is largely of long and short rectangular panels with quarter-round moulding to stiles and rails; 6-panel doors, boxed beams and moulded cornices throughout plus bolection mouldings to landing doorways. The panelling to the east of the stairs on the landing is different and rather unusual being of a refined plank and muntin type: it too appears mid-C18 and continues alongside the stairs up to the attic.

Western room on ground floor has massive chamfered cross beam and a large fireplace to back wall with timber lintel and splayed rough stone jambs; large lateral fireplace, which formerly had 2 smoking ovens, in large room (kitchen) in north-south range may be secondary as its jambs partly conceal the roughly chamfered cross beams; tile floor in this room and in hall. Western bedroom has in addition to the panelling mentioned above an inbuilt C18 cupboard with carved shelving to the north wall and to the west wall an elaborate C19 fireplace with carved brackets to the mantelshelf, above which is a mid-C18 oil-painted panel depicting a view of Caernarfon with ships in the foreground; boxing removed from cross beam. Bedroom in northern block similar but slightly less elaborate and no inbuilt cupboard; painted panel to north wall depicts scene of Conwy. Large room at south end of north-south range has panelling only to the east wall and 2 boxed cross beams; formerly had painted panel similar to others but this appears to have been removed when the original fireplace was taken out. Wide floorboards throughout. Attic has simple plank and muntin partitions and substantial A-frame trusses with double purlins, in 6 bays to north-south range, in 3 bays to entrance range and in 2 bays to northern block.

2-storey and attic, basic L-plan (see History). Roughly coursed rubblestone with traces of render and limewash; partly grouted slate roof with slate-coped verges. South (entrance) elevation has 3 bay-range to left with doorway to right in angle with projecting 2-bay range; late C20 plastic windows in original C18 openings replacing recessed 12-paned sashes throughout; rebuilt integral end stacks to both gable ends, left with doorway on ground floor and 2 windows on first floor and that to projecting range with 2 blind windows on first floor; rooflight roughly to centre of main range. East elevation has C20 lean-to to left with 2 windows to right on ground floor (left wider) and 5 windows, 2 to left and 3 to right (middle of latter group an insertion), on first floor; boarded door to north gable end. Northern projection has integral end stack but is otherwise blank to gable end; west side has brick parapet and 2 symmetrically spaced windows on each floor, the right abutting the large lateral stack on the back wall of the entrance range.