Ystradgynwyn

Ystradgynwyn is a farmhouse with early 19th century features on its front and an attached barn range. The building is constructed of stone, with parts rendered and painted, and has a Welsh slate roof with bracketed eaves. There is an end stack on the left, a ridge stack on the centre right, and a large external stack incorporated into the barn end on the right. These stacks are made of dressed stone and have shallow cornices. The farmhouse has two storeys and a three-window range featuring 8/8 pane horned sashes with shallow sills. The ground floor windows are adorned with painted hoodmoulds, and there is a gabled porch at the doorway on the centre right. The barn has a steeply pitched artificial slate roof made of stone rubble and features a hood over a double doorway, along with small rectangular openings, some of which have been altered, but it lacks ventilation slits.

Inside, the layout retains a lobby entry plan, with a room to the right that has a large open fireplace in the gable wall, which incorporates bread ovens. There is a doorway at the rear leading to an outshut, and a high cross beam that is lightly chamfered and stopped. The room on the left has a central fireplace with a replaced grate from a former railway station, and stairs ascend on the far side, which have been renewed, as has the cross beam. There is a further room to the left that also contains a fireplace. The barn range attached to the right features ties to trusses that are similarly chamfered and stopped.