The original Glyndyfrdwy Welsh Calvinistic Chapel was built in 1839, and then rebuilt to the design of architect Richard Owen of Liverpool in 1872. This later chapel is stone-built in the Gothic style with a gable-entry plan. The end facade has a steep gable with ashlar dressings and metal finial to the apex. Over the centre doorway are triple lancets with plate-traceried windows. Both the doorway and windows have semi-polygonal heads, the flanking windows also with quatrefoils. The return elevations have yellow-brick dressings to tall segmentally-headed windows. At the rear the vestry adjoins under same roof span, single-fronted, with a centrally-placed and triangular-headed attic dormer. There is a lower chapel house to the rear. A probable Sunday School is built at right angles to the right-hand return. Glyndyfrdwy was in use as a chapel in 1995 but had been converted for residential use by 2003.

RCAHMW, January 2010