The Chapel Schoolroom was built c. 1900 and is situated to the right side of of the United Reformed Church on Castle Street; built to a rectangular plan with gable end to the street. It is a 2 storey building with an entrance hall incorporating a double flight staircase. It is constructed of rubble sandstone, rendered in cement, with a slate roof, exposed trusses and timber windows of substantial proportions. The three bay pedimented front, similar to the adjoining chapel but plainer, with minimal pilasters and cornice has a central entrance with three round headed windows, the outer ones of full height, and one shorter at centre over the doorway. This has plain double doors with a 2-light transom and a plain pilastered surround of a very basic Tuscan order, with 'THE SCHOOL ROOM' on the entablature. There is a large area of consecrated ground to the rear.n The interior is now modern offices and has no historic features.

Reference: Cadw listed buildings database; architect's report, dated 1991.