Capel Salem, including attached Sunday School, forecourt gates and railings and hall to rear

A classical style chapel of snecked rubble stone with grey freestone dressings, on a rusticated plinth, and slate roof. The 3-bay gable-end front has a giant arch and pediment characteristic of Thomas. Tuscan pilasters are on high bases to sill level. The outer bays have 2-light windows with tripartite key stones to round heads, and moulded impost bands. The wider central bay has a recessed porch with 3 round-headed arches with tripartite keys, of which the central arch is wider and higher and has 2 detached Tuscan columns carrying the projecting balcony above. Inside the porch is a boarded wainscot and a round-headed window. In its return walls are double doors with round-headed panels and segmental-headed radial-glazed overlights. The balcony has an open balustrade. Above it is the large gallery window, which has 2 main lights under a round large tracery light, in an eared architrave with tripartite keystone.

The 5-window side walls, of coursed local slate-stone rubble, and have round-headed 2-light gallery windows. On the R side is an attached Sunday school facing Snowdon Street, of roughcast painted light blue, slate roof, and ball finial over the R-hand gable. It has 4 round-headed 2-light windows. In its R gable end is the entrance, in a lower gabled porch with panelled door facing the road, which has an opening boarded up on its R side. The gable end of the school has 2-light windows flanking the porch and an oculus in the gable. At the rear the school has been extended to form a shallow lean-to against the rear of the chapel. The chapel gable end has a round-headed louvered vent in the gable.

The main chapel entrance has distinctive forecourt gates and railings. The forecourt has a dwarf wall of snecked rubble with freestone coping. Terminal and gate piers are square freestone monoliths incorporating round-headed raised fields, and moulded caps and bases. Double cast iron gates have dog bars with spear finials, similar finials over the top rail, and incorporate neo-classical fretwork. Flanking railings are similar.

The main chapel has a flat panelled and boarded ceiling with large ceiling rose, and a cornice at the impost level of the windows. A 3-sided gallery is on classicising cast-iron columns, has a panelled wooden frontal on a dentil cornice, and steeply-tiered pews with doors. At the entrance end of the gallery is an organ (by Bridley and Foster of 1884). The wooden pulpit and panelled set fawr are later C19 alterations. The pulpit has a bowed frontal with relief panels, turned newels and balusters to the stairs. Behind the pulpit is a shallow arched recess with Corinthian half-columns and fleur-de-lys decoration. Panelled pews with doors are in 3 ranks, of which the outer are parallel with the walls.