Capel Siloa, chapel house and attached front walls

Capel Siloa is a chapel and chapel house built in a single range, featuring colourwashed stucco and a slate roof. The chapel is located on the left, while the house is on the right. The chapel has a gabled stuccoed porch situated between two long arched windows, which contain eight large panes and Y-tracery heads. The windows are adorned with moulded hoods that have keystones and stops. The porch features an arched doorway with a matching hoodmould, and the inner door has Y-tracery in the fanlight, along with matching windows. The left end wall of the chapel is windowless and stuccoed, while the rear is constructed of rubble stone and has two 8-pane sash windows.

The chapel house is two stories tall and has two bays, with a roughcast stack at the right end. It features a 20th-century door and original hornless sash windows. There are two 9-pane windows located under the eaves, along with a door and a 12-pane sash window below. The gable verges on the end walls overhang, and the house has an added lean-to.

In front of the chapel, there is a forecourt enclosed by attached colourwashed rubble walls on the front and right sides. The forecourt features small double iron gates in the center and a single cast-iron gate to the left. The walls are topped with rough diagonally-laid stone coping and raised as piers with flat slate caps on either side of the central entry.

The interior of the chapel is simple and lacks a gallery, with a deep plan aligned on an end-wall pulpit that allows entry from the center of one side. It contains painted grained numbered box pews with simple panel backs and doors, slightly raked at the back, arranged in two main blocks. There are two wooden posts with paired gas lamps, and a boarded dado runs around the interior with a thick moulded top rail that slopes up on the end wall beside the pulpit. There is a large open area in front of the pews with some loose benches, as well as fixed benches with shaped ends on the fronts of the main pews and on a block of two pews against the rear wall. Additional box pews are located on each side of the set fawr, with panelling on the back of the set fawr that is continuous with the pew doors on either side. The set fawr consists simply of benches on the pew fronts facing the pulpit. The small pulpit features canted angles, vertical panels, and a moulded cornice, with a single flight of steps from the right that has stick balusters and a turned newel. There is a painted arch on the end wall behind the pulpit, and the plaster ceiling has sloping sides with the lower parts of two collar trusses visible.