Plas Gwyn including Plas Bychan

House, mid C18, altered. Roughcast with stucco dressings, slate close-eaved roof and roughcast external end stacks. Stone coping to gables on moulded kneelers. Two storeys and attic, 3-window range, rusticated quoins. Earlier C20 metal windows in original openings. Triple casements with small-paned top-lights. Openings are cambered-headed with painted stone rusticated voussoirs and triple keystones. Centre door with painted stone shouldered architrave, frieze and pediment. C20 door. Doorstep inscribed with height of 864' (263m) above sea level. Three C20 casement pair small timber dormers on eaves with carved wood crestings. Added single storey range to right with 3 earlier C20 large square small-paned windows and door between first and second windows. Roughcast right end stack. To left of house a rubble stone garden wall with blank window and 2 doors. Rear of house is windowless to right, rear wing left with roughcast end stack, coped gable and one-window range to N. French window to ground floor, triple casement above and similar eaves dormer to those on front. Lower wing beyond now a separate dwelling (Plas Bychan) has small-paned casement windows, similar dormers, and hipped-roofed porch.

Said to have C18 stair with turned balusters, and panelled doors.