Outbuilding to rear of Plas Llangoedmor

The outbuilding to the rear of Plas Llangoedmor is an earlier to mid 19th century structure, featuring whitewashed rubble stone and imitation slate roofs. It is a single storey and loft building arranged in an L-plan. The openings have cut-stone voussoirs. At the north end, there is a short gabled return with a broad arch in the angle and a 9-pane window to the left. The main range faces west and includes a ground floor window, another window, a door, a taller door with an overlight, another window, and a door. On the first floor, there are two 6-pane casement windows with stone voussoir heads. The south end of the ground floor has one window. The south end range is set back and features large stone outside steps across the west front, with an arch underneath that provides access to a ground floor store. The first floor has a window, a door, and another door leading to an outside-stair landing, with the window having horizontally-sliding casements, all supported by timber lintels. There is a brick stack at the south end.

Inside, the north end room contains a large fireplace, with a recess for a copper on one side and a bread oven on the other.