The present Moel-Adda Calvinistic Methodist Chapel was built in 1877. It is stone-built in the Sub-Classical style with a gable-entry plan. The gable-entry facade has round-arched openings, a centre doorway with date stone of "1877" over, tall flanking 8-pane sash windows and has a circular vent in the gable apex. Two tall cambered-headed 8-pane sash windows in the right-hand elevation now adjoin a double-fronted two-storey house under the same roof span. There is a low stone boundary wall along the right-hand side and a dwarf wall and railings enclose the front forecourt. By 2003 Moel-Adda had been converted for residential use.

RCAHMW, January 2010