Seion Baptist Chapel was built in 1826 to the design of architect John Breeze Roberts of Gweinidog. The chapel was modified in 1863 and rebuilt in 1884 by architect M. Williams of Colwyn Bay. The 1884 chapel was built in the Gothic style to a gable-entry plan, with a 3-bay facade, a tall recessed feature Gothic arch surrounding a central entry and a window over. There are flanking windows in the outer bays and small pinnacles to the gable apex and kneelers. By the late twentieth century Seion had fallen into disuse.

RCAHMW, January 2010