St Mary's Church, 10 Chapel Road, Ballinderry Upper, Lisburn, BT28 2JF

St Mary's Church is a freestanding rendered Roman Catholic church located on the north side of Chapel Road in Upper Ballinderry, Lisburn, set 1.4 miles east of Aghalee overlooking the surrounding countryside. Built in 1845, it comprises a main church body with a single-storey lean-to extension to the rear and a pitched roof single-storey porch entrance to the west, all set within landscaped grounds with mature trees including yew.

The church is constructed of rubblestone with roughcast render finish over a smooth rendered, slightly projecting plinth. The main pitched roof is natural slate with angled ridge tiles and masonry coping to gable verges, topped with cast-iron Celtic cross finials. The porch and rear extension have man-made slate roofs. Rainwater goods are a mixture of uPVC and aluminium.

The principal south elevation features four pointed-arch headed window openings with projecting stone sills, each containing leaded stained-glass timber-framed windows with steel mesh grilles. The western porch has a modern stone walling finish with modern random pattern stone and roughcast render. The entrance door is glazed timber with double leaves, set within a metal gate featuring floral motifs and a cross above. The porch floor has small square modern tiles with a contrasting simple cross motif. Two columnar yews stand against the south elevation. The deep eaves to the porch are uPVC with bargeboards.

The west elevation shows the gable ends of both church and porch, the church in roughcast render and the porch with modern random pattern stone walling and roughcast render apex. A square-headed window opening contains an amber-glazed timber window with steel mesh grilles.

The north elevation comprises the church and the modern rear lean-to extension. The western end of the extension features a full-height square-headed window opening with a staggered multi-pane timber-framed window containing coloured glazing and a steel mesh grille. Centrally placed is a square-headed window opening with a three-part timber casement window on a projecting shallow concrete sill (damaged), protected by a steel mesh grille. The eastern end has a similar square-headed window opening to the left of a door opening. The door opening contains a replacement timber door and wall-mounted steel gate with motifs matching the porch screen. A steel mesh enclosure against the building at the western end of the rear extension contains a gas or oil tank. The east elevation has a roughcast render finish with a square-headed window opening to the extension containing a timber casement window with grille screen.

The rear extension features square-headed window openings with timber casement windows, including one to the western end with full-height staggered multi-pane glazing in coloured glass.

The property is bounded to the south by a rendered rubblestone boundary wall (render to internal face only) with pyramidal-shaped limestone capping. The west boundary includes a rounded-headed wall section. A pair of square rubblestone piers with limestone capping support a replacement plain steel gate at the entrance.