Horeb Presbyterian Church including attached hall to right

Horeb Presbyterian Church, which includes an attached hall on the right, is a plain chapel built in the 19th century. It features an unusual gable-end facade with four windows and a lower hall wing. The exterior is cement rendered and topped with a Welsh slate roof that has overhanging eaves. The main south-facing front has four identical round-headed gallery windows that have multipane and margin glazing, some of which incorporates colored glass. There is a blind roundel at the apex and a small date plaque in the center. On the ground floor, there are two doorways with boarded doors and margin-glazed fanlights. The three-bay hall range is set back and has 9/4 pane sashes along with a cambered-headed doorway. The rear elevation of the chapel features a simple moulded cornice and four rectangular margin-glazed windows on each floor.

Inside, there is a three-sided gallery with a panelled front, supported by five cast-iron columns and deep panelled coving. The panelled pews, which have moulded ends, are long and curve around the corners. The woodwork throughout is finished in light-toned grained paint. On the ground floor, the panelled pews have doors, and those on the sides face inward rather than being angled, with a panelled dado. There is a panelled set fawr and a panelled pulpit with a simple bench and additional panelling at the back that rises to a scrolled pediment. Small vestibules with doorcases containing part-glazed doors and margin glazing provide access to the ground floor at the preacher's end and the gallery. The render is part scored.