Hall attached to Trinity Church

The hall attached to Trinity Church is a classical building from the late 19th century, featuring a two-storey rendered front with a pediment and a four-bay layout. It has an added full-width ground floor lobby and painted freestone dressings. Before 1894, the building had a flatter pediment and a different parapet, with bases for acroteria still visible. The pediment is interrupted by a giant arch over the recessed central two bays, which includes lettering. The outer advanced bays are flanked by composite pilasters with a plain frieze, and these bays contain horned 12-pane sash windows with architraves and detached pediments. The central windows are semi-circular headed with moulded heads, Ionic pilasters, and balustraded aprons, along with an inscribed and foliated datestone.

Inside the lobby, channelled pilasters flank the outer bays, and there are detached cornices over horned 6-pane sashes. The entrances are round arched and paired, featuring an impost band, 6-panel doors, fanlights, and a central lamp bracket. The façade wraps around the corner to the left, where composite pilasters flank a narrow end bay. There is a five-window section and an additional bay beyond that, mostly symmetrical. The building has cornices on both floors, sill bands, and an impost band to the gallery and channelled ground floor, with small pane sashes that are round arched over square headed.

Channelled pilasters were added to the narrow end bay in 1908-1909, which includes Venetian windows (with the centre window blind), pilasters, and an apron, as well as a blocked door flanked by sash windows. The right-hand side of the hall range is accessed by a round arched doorway located to the right of the façade, leading to a three-storey hall range.

The interior is rectangular with a raked gallery supported by quatrefoil-shaped cast iron columns with annulets, and it features a panelled gallery front. The ceiling was altered in the 1950s, and the platform has been modified, with an ironwork balustrade to the set fawr.