Glandwr Methodist Sunday School was built in 1896 as a branch of Capel Rhiw, Rhiwbryfdir (NPRN: 8407), and to the design of architect Owen Morris Roberts of Porthmadog. The school is built in the Sub-Classical style with a gale-entry plan. The building has rock-faced stone in snecked courses, flat-headed openings, a central plain entrance door with overlight, flanking 2-pane sash windows with horns, plain bargeboards, terracotta finial and a slate roof. By1995 the school building had been converted for industrial use.

RCAHMW, February 2010