Sion United Reformed Church

Sion United Reformed Church is a Grade II* listed building featuring a classical facade characterized by giant order columns on high bases, topped with composite capitals that support three semicircular 'triumphal' arches, and a pediment above. The facade steps back at both ends and is constructed from bull-nosed rubble with freestone columns and dressings. It includes a bracket cornice and a finial on the pediment, which is decorated with a punched roundel within a triangular frame. The building has two order arches throughout and recessed Italianate windows with twin small pane lights. Below the mezzanine level, there is a dentil cornice with plain rectangular lights, featuring three in the outer bays and four in the center, which have modern glazing. The arched entrances are slightly broader in the center and include panelled doors with bosses and geometric shapes in the spandrels. Foundation stones are visible at the pier bases. The side elevations are five bays wide, finished in cement render with band courses and two-light windows above paired single light arched-headed windows, and feature bracket eaves. A red brick school room was added to the rear in 1932.

The forecourt is enclosed by a brick wall on the right and the coursed rubble rear wall of Castle House's stable range on the left. There are some slate stone memorials and spearhead finials on the railings at the southern end.

Inside, the church has a rectangular galleried layout with some alterations made around 1960, including the insertion of a segmental arched ceiling with circular lights. The front is boarded with a foliage trail band to the raked gallery, which is supported by cast iron columns with plain foliage capitals. The balustrade has been removed from the platform but is retained on the steps leading up to the 'big seat'. There is a memorial to John Jenkins by R Jerman, and a rare example of a hollow 18th-century bureau that was used to hide priests. The stained glass windows were made by Maile and Son of London.