Mountpottinger Presbyterian Church Hall & Lecture Room, Castlereagh Street, Belfast, Co Antrim

Mountpottinger Presbyterian Church Hall and Lecture Room is a two-storey Victorian building dated 1893, designed by architect Thomas Roe. It stands on Castlereagh Street in east Belfast, adjoining a Presbyterian Church constructed in 1869 to designs by William Hastings.

The building is rectangular in plan with a pitched natural slate roof fitted with cast-iron ogee gutters and circular downpipes. The walls are red brick laid to Flemish bond with terracotta mouldings and decorative eaves detail.

The principal southwest-facing elevation is symmetrically arranged and highly decorative. It features a pilastered façade with recessed central bays embraced by full-width round-headed arches. The ground floor comprises paired windows with square heads surmounted by terracotta pediment drip moulding. The first floor contains Palladian-style windows with round heads and continuous drip moulding. Two sets of double-leaf diagonally sheeted timber doors are set into camber-arched openings with chamfered surrounds and serve as the main entrances.

The left gable elevation is four bays deep and matches the principal elevation in detailing. It is surmounted by a diminutive pediment bearing the date "1893" with "LECTURE HALL" inscribed on the frieze below. This elevation features three round-headed Palladian-style first floor windows with continuous drip moulding and square-headed ground floor windows with terracotta pediment drip moulding. The far left bay is partially abutted by the adjoining two-storey church.

The rear northeast-facing gable elevation is abutted by the Romanesque-style six-bay two-storey church of 1869. The hall elevation features red brick walling with raked coping and string course, brick pilasters surmounted by squat moulded pinnacles, and drop corbelled eaves with cogged course and ogee-moulded gutters with downpipes centred on buttresses. A single-storey lean-to porch with diminished side doors flanked by angled buttresses projects from this elevation.

The right elevation is plain with no detailing and is partially abutted by a modern flat-roofed extension. Windows throughout are replacement timber casement units.

The church hall is prominently sited directly on the street within a largely two-storey terraced Victorian and modern residential setting, with paving immediately to the north and southwest sides. Further terraces line the adjacent streets, with industrial units located at the northwest end opposite the hall.