Capel Salem, including attached house, forecourt wall and outbuilding

Capel Salem, which includes an attached house, forecourt wall, and outbuilding, is a chapel and vestry built from rubble stone with slate roofs. The chapel features late 19th-century cement render on the lateral front, displaying the inscription "Salem, Mynyddbach, 1844" in raised cement letters. There is a small slate datestone at the eaves on the left side. The facade has been altered and includes two 12-pane horned sash windows at different levels on the left, with the outer window positioned slightly higher. To the right, there is a later 19th-century gable porch and a narrow outer window. The porch has a boarded door and overhanging verges. The rear is made of rubble stone and has two 12-pane sash windows with brick heads. The right end wall is slate-hung with overhanging verges.

Attached to the chapel is a two-storey, two-bay house/vestry that is rendered and features a stone chimney on the left. The first floor originally had two 20-pane sash windows, which were removed in 2004. The ground floor includes a doorway on the extreme right and a sash window with marginal glazing bars to the left, also removed in 2004. The left gable end, which was dismantled in 2004, had steps leading up to a first-floor panelled door and an attic window at the rear.

To the left of the house is a single-storey rubble stone outbuilding with a slate roof, a yellow brick chimney on the left end, a small window on the front left, and a doorway in the left end gable. The chapel and house/vestry are set behind a stone forecourt wall with iron gates at each end.

The interior of the chapel was partly dismantled in 2004 and features a flat ceiling with five small roundels, a wood panelled dado, a raking floor with box pews, and a set fawr enclosure with a rail. The pulpit is painted and grained, with a canted panelled front and turned balusters on each side, along with an arched panelled pulpit-back.