Exterior view. Horeb Calvinistic Methodist Chapel was first built in 1746, but it has been extensively renovated and is now a domestic dwelling. The former chapel's exterior is rendered and painted, and it is topped by a pitched slate roof. It is entered via a lean-to porch to the centre of the long southern elevation. The doors and fenestration are all modern replacements. To the south east of the chapel is the former Sunday School, built from unsnecked rubble masonry, with pitched slate roof and small paned windows.