Clydach Wesleyan Chapel including Sunday School and railed forecourt

The building comprises a Wesleyan Chapel, a Sunday School, and a railed forecourt, dating from the 18th and 19th centuries. The chapel was built in 1829 and renovated in 1891, while the Sunday School was constructed in 1902. The building is constructed of rubble with a half-hipped artificial slate roof.

The chapel has a long facade to the road, with the chapel to the left and the Sunday School to the right. The chapel features two tall pointed windows with sandstone voussoirs and 34-pane timber windows with intersecting glazing bars. A tablet above the entrance is inscribed ‘English Wesleyan Chapel 1829. Renovated 1891’. The Sunday School has windows on both storeys, sharing the same roofline as the chapel. The upper floor has 3/2 horned sashes, wider to the right, with cambered stone voussoired heads. A similar wide window is present on the ground floor to the right, with an ashlar band inscribed 'Wesleyan Sunday School 1902'. A gabled porch is located on the ground floor to the left, featuring a bargeboard and a pointed doorway with stone voussoirs and boarded doors. Several eroded foundation plaques are visible on the Sunday School. The gable ends are rendered, and a concrete block addition is present on the left. The rear elevation is rendered and rises to three storeys, with a basement due to the site's steepness. This rear elevation has two windows to the chapel front, and five windows below, with the alternate three featuring pointed heads and 5-pane Y-tracery. Two other windows on this elevation are 20th century, likely replacing doors. The upper floors of the Sunday School have sashes similar to the front, wider to the left. A boarded door is located on the ground floor to the left, with a 20th-century window to the right.

The forecourt railings are set on low rubble walls, with a porch slightly projecting beyond, in line with the pavement. The simple rails have spear-type finials, and the gate to the right has a lozenge pattern within a dog-rail and posts with ball finials.

Inside the chapel, a fine rear gallery from 1829 remains. It is painted, with tall panels, the central two of which slightly project forward. The gallery is supported by two timber columns, with an elliptical head between the capitals, and features a deep plaster cove beneath. The pulpit likely dates from 1891; it has a bullnosed front with turned balusters and a central panelled lectern. The chapel contains 20th-century seating. The plaster ceiling has a central rose and two outer roses. The basement under the chapel contains a central cast iron column, with painted seating around two sides. These seats have panelled backs and are likely from 1829, having been reset from the chapel. A matching low polygonal pulpit is also likely reused, having been cut down to fit the space. The schoolroom includes a staircase to the basement and upper floor, and both levels of the chapel are accessed via stairs.