St John The Evangelist Roman Catholic Church, Abercromby Road, Castle Douglas

St John the Evangelist Roman Catholic Church was constructed in 1867. It is a simple Gothic style church with an attached two-story presbytery. The church is built of whinstone rubble with red sandstone ashlar bands and dressings, including a base course and hoodmoulds.

The spire is attached to the outer right bay of the south elevation. It has a square base with small lancet windows lighting the stairwell. Above the eaves, the base is chamfered to form an octagonal shape, with louvred round-arched openings on each face of the bell chamber. Bracketed eaves lead to a polygonal ashlar spire topped with a decorative cast-iron finial. A gabled porch is set in the re-entrant angle with a pointed arch doorway flanked by nookshafts with simple capitals, a two-leaf boarded door, and a stone cross finial.

The south elevation is characterized by buttresses dividing five bays. A lancet window is in the outer left bay, while paired lancets are in pointed arch panels in the three centre bays, featuring a quatrefoil carving at the apex. The north elevation is largely blank, with a set-off chimney breast to the outer left, topped with a cigar-stack. A lancet window is located to the outer right. The east elevation features a large pointed arch panel containing a plate traceried rose window and two traceried windows, with two arrowslit windows below. A decorative stone cross finial sits at the apex.

The apse forms the canted western end elevation and contains a lancet window in the outer bay to the south, with a slender metal cross finial. The windows use a diamond-pane lead glazing pattern and the roof is covered in graduated grey slates, with decorative ridge ornament. The interior was not inspected in 1990.

The attached presbytery is a simple two-story building constructed of matching materials. It has bipartite windows at the first floor with column mullions and moulded lintels. The south elevation features a gabled porch in the re-entrant angle and an advanced outer right bay. The pointed arch doorway has a roll-moulded surround and plate glass fanlight, with an arrowslit on the west return. A small first-floor window is positioned above. Lower bays are advanced to the right, containing two ground-floor windows with moulded lintels and bipartite windows in a gabled dormerhead that breaks the eaves. A gabled bay to the outer left has bipartite windows to each floor, with an arrowslit at gablehead and a decorative wrought iron finial. The sash and case windows have a four-pane glazing pattern. The roof is covered in graduated grey slates, with ashlar coped skews. A set-off wallhead stack is present on the blank west elevation.

Retaining walls are constructed of whinstone rubble, with saddleback ashlar coping stepped at intervals.