Garthgynan

A large farmhouse with a brickwork front elevation; the rear and side elevations are partly in local coursed limestone and partly in brickwork. The house has slate roofs and coped main gables. The original brickwork is in English Garden Wall bond. The house is double-pile, mostly 2½ storeys, part 3 storeys, and has a rear gabled bay of slight projection with bargeboards. The front pile has end chimneys; the rear pile has an end chimney at west only and a very substantial lateral chimney facing the garden. All the chimneys are carried well above roof level before dividing into star or ribbed diagonal stacks. One small rooflight at rear. Tie anchor plates on the rear gable.

The front elevation is nearly symmetrical, of three bays, with the right window position moved in to avoid the kitchen chimney. In the outer positions 12- or 6-pane sash windows with timber mullions and side sashes; in the centre position 16- or 8-pane sash windows; all sashes hornless, all frames concealed. The rear elevation includes three 16-pane hornless sash windows in exposed frames.

Single storey monopitch annex at right (west), with rear porch; brickwork, slate roof.

A rubble limestone wall with irregular coping marks the boundary of the house site with the farmyard.

Three unit plan in both front and rear piles; central staircase of C17 with solid newels and bulbous turned balusters; upper flight of lighter construction. There is also a servants' staircase, very narrow and steep. The right unit at front is the kitchen, with a large fireplace with cambered bressummer and oven at its right. The kitchen ceiling has two exposed main beams, that nearer fireplace has unused mortice holes and is perhaps relocated. There is a large cellar with stepped tongued chamfers on the floor beams above.

Attics open to roof: rafters pegged into mortices in the purlins. An original principal rafter is detectable at right of centre at the front of the house, showing that the front has been heightened.