Capel Engedi, including forecourt gates and railings

This is a classical style chapel, likely dating to the 18th century, situated within a forecourt featuring gates and railings. The chapel's front has five bays spread over two storeys and is constructed from cyclopean rubble stone with freestone dressings and rock-faced rusticated quoins. The upper-storey bays are emphasised by rusticated pilaster strips, with the central bay slightly recessed beneath a 'glorification arch' within the pediment. The pedimented gable features a moulded cornice and eaves. A central three-bay portico, raised on a plinth of rock-faced and cyclopean rubble, presents Tuscan columns and a dated inscription on the entablature. A parapet with a balustrade tops the portico. Three round-headed doorways are set within the portico, the central one larger, all with plain jambs, a moulded impost band carried over the keys, and double-panelled doors with two-pane overlights. The windows are hornless sashes with margin glazing. Segmental-headed windows are present in the lower storey bays while the gallery windows have keyed round heads and a moulded impost band which also acts as a sill band. Another moulded band runs between the storeys.

The plinth of the portico is ramped at the right end, leading to stone steps. Stepped freestone gate piers with iron gates and arched iron overthrows, enriched with scrollwork, appear at the sides. The gates incorporate twisted bars and fleur-de-lis finials. Continuous railings, also of similar detail and cast by Williams of Liverpool, extend across the portico. Screen walls, slightly set back from the chapel's front, flank both sides—one roughcast with a double door, the other pebble-dashed with a boarded door. The side walls have six windows each, with moulded stone eaves. The right side wall is pebble-dashed and primarily has boarded-up windows; however, the gallery retains three small-pane, margin-lit sashes to the left side. The left side wall is constructed of coursed rubble and displays a similar pattern of boarded-up windows, also retaining three margin-lit gallery sashes. The rear elevation is pebble-dashed, featuring a central projection with a hipped slate roof, with segmental-headed, margin-lit sash windows to the upper right, upper left, and lower left. Attached to the right side of the rear is a single-storey, pebble-dashed hall.

The chapel’s interior is a fine rectangular space with extensive classical detailing. A raked gallery, complete with a curved and panelled front, is supported by cast iron columns featuring brackets and foliage capitals. The coffered ceiling displays ornate roses and deep dentillated ribs. The organ chamber has an arched surround with double fluted pilasters and a panelled soffit. An octagonal pulpit is also present, along with retained set fawr and set canu, exhibiting turned balusters. The basement contains a minister's room to the left, with offices and a five-bay schoolroom attached nearby.