Little is known regarding the origin of the Penchwarel Calvinistic Methodist Sunday School, which has since been renovated into a domestic dwelling and therefore lost the majority of its original features. It is a small roughcast two-storey building with an uncoursed rubble stone facade, entered via a central doorway in the long wall frontal elevation. It is topped by a pitched slate roof. The windows, which are all modern, are plain square-headed windows, with two tiers of two small windows in the side elevations, and two tiers of larger windows flanking the front entrance, with a single smaller window above the doorway.
Source: RCAHMW Inventory Documents
K Steele, RCAHMW, 3 March 2009