Mynydd Seion Independent Chapl was built in 1893, rebuilt in 1903 and subsequently demolished c.1989. The 1903 chapel was built in a Simple Vernacular style, with some simple Arts and Crafts features, such as an Arts and Crafts door. The chapel had a long-wall entry, with the door to the left and a vestry or other room to the rear right of the chapel.

RCAHMW, October 2008