Mynydd Independent Chapel is shown on the First Edition of the OS 1/2500, 1891. It appears to have been of the lateral entry type with porches at the NE and SW ends of the SE side. The chapel was built in the Simple Round-Headed style. In 1896 this was rebuilt with, on the SE side, corner vestibules accessed from a central covered porch. The porch has a single, central cast-iron column supporting a small, plain pedimented gable.

RCAHMW, D J Percival, April 2007