St Malachy's RC Church, Kilcoo Village, Dublin Road, Ballymoney, Castlewellan, Co Down, BT34 5HP

St Malachy's is a Roman Catholic church built in 1901, replacing an earlier church on the same site dating from 1832. It stands at the centre of Kilcoo village, 4.5 miles south-west of Castlewellan, set back from Dublin Road with its own grounds, small graveyard to the east, parochial house to the west, and former school also within the curtilage.

The church is designed in the gothic style as a two-storey structure with a tall three-storey pinnacled tower. The principal façade faces south, where a slightly projecting gabled porch forms the main entrance. The porch door has a pointed arch head with archivolt and drip moulding terminating in label stops, flanked by tall narrow arrow-loop windows. Double timber doors with diagonal sheeting and decorative strap hinges occupy the entrance opening. Above the porch are three tall pointed arch-headed windows, the central one being taller and wider. The front gable is surmounted by a Celtic cross, with a small louvered window opening at the apex. Stepped reducing buttresses with small gabled minarets occupy each corner.

To the right and slightly set back stands the three-storey tower. Its ground floor has squat pointed arch-headed windows to the south and north faces. The first floor has tall lancet windows on the south, east and north faces. The second floor features tall pointed arch-headed louvered openings on all faces. The tower is finished with minarets topped by tall pyramidal caps with metal finials, between which are simple castellations. All window openings throughout the tower have smooth stone dressings.

The eastern façade contains a single lancet window to the left of the tower. To the right of the tower, five bays are framed with reducing buttresses, each containing paired lancet windows with smooth stone dressings. The sanctuary's western side is blank.

The western façade mirrors the eastern design with five bays of paired lancet windows separated by buttresses. A small lean-to porch is located to the left. The southern face of the sanctuary is blank, while the western face has a central door with diagonal sheeting and sash windows either side without astragals. To the far left is a one-and-a-half-storey projecting gabled bay with two widely spaced pointed arch-headed windows at ground level and paired sash windows without astragals at first floor, surmounted by a relieving arch.

The northern face contains two small paired sash windows without astragals and with decorative security grills. The rear northern gable has three high-level lancet windows centrally placed, with stepped reducing buttresses at each corner. To the right lies the northern side of the two-storey section.

All external walls rest on a small projecting plinth. The walls are finished in dark grey-blue rock-faced granite with smooth light sand-coloured stone dressings. Some stone loss reveals a brick core, indicating that the external stone is cladding rather than load-bearing structure. The main roof is finished in Bangor Blue slate, with eaves supported on projecting stone brackets. The one-and-a-half-storey western section has eaves with exposed rafter ends. All gables have shallow smooth stone parapets. Cast iron ogee gutters and a mixture of square and round downpipes finish the external envelope.

To the roadside stands a low stone wall in matching stone, with decorative wrought iron gates supported on square gate pillars set in a semi-circular screen wall.

The entrance porch and lobbies were renovated in the 1970s. The church remains in active use as a Roman Catholic place of worship.