Pen-y-Groes Independent Chapel was built in 1825, extended/rebuilt in 1842, 1883 and 1914. The schoolroom built in 1898. The present chapel, dated 1914, was built in the Arts and Craft style with a gable entry plan, ruble stone walls with a plaster facing, a slate roof, two storeys and flat headed windows with coloured glass.

RCAHMW, August 2011