Plas Trefilan

Rubble stone, originally roughcast, with pyramid slate deep-eaved roof with paired brackets to eaves. One rendered stone stack to left of apex. Originally there was another to right of apex. Square plan, two-storey, three-window range with raised plinth and basement under SW angle. 12-pane sash windows with stone voussoirs. Centre six-panel door, two panels glazed with lozenge tracery. Similar lozenge tracery to overlight. Fine painted timber trellis porch with arched entry, leaf-pattern spandrels, lozenge pattern uprights and top rail, dentils and paired brackets. Sides have intersecting diagonals to make centre lozenge shape.

W side has C20 basement door (basement formerly only accessed from inside), two 12-pane ground floor sashes, that to left apparently replacing a C19 bay window, and one first floor sash to left. E side has ground floor C20 French window to left, replacing window, and 12-pane sash to right. 12-pane sash to first floor right. Added NW service wing, hipped to N with altered W lean-to, former dairy. Rear wall of house is part rendered.

Centralised plan with broad entrance hall with elliptical arch. Stick baluster stair with curved return to landing. Landing on three sides has plaster-moulded circle in ceiling around conical tall roof-light up to near roof apex. Cone is of lath and plaster. Ground floor 6-panel doors. E rooms are joined into one, SW room has shutters. Rear panelled door with overlight.