Old Lowland Church, Campbeltown

The Old Lowland Church, dating from 1706 and restored by H.E. Clifford in 1904, is a hall church with a single aisle projecting to the northeast and office accommodation at the southeastern end. The building is constructed of random rubble walls with ashlar dressings, some of which are droved, and features chamfered window arrises.

The southwestern elevation, which serves as the main entrance front, is six bays wide. Four bays are widely spaced, while a two-bay gabled section is set to the outer right. A round-arched entrance is located on the outer left, topped by an oval oculus. A raised wallhead is present above, incorporating a corbelled parapet. Within the round-arched opening are paired round-arched windows, with glazed panels in the apex of the three centre bays. The two-bay gabled section has a door at ground level on the left and a crowstepped gable above, intersecting with the corbelled parapet at the corner to the right. Two inscribed stones read "ERECTED 1706" and "RESTORED 1904."

The southeastern elevation, facing St John Street, is two storeys high over a basement and partially exposes three bays to the right. The first bay lacks a first-floor window, with an oval oculus above. A corbelled parapet sits above, backing a crowstepped gable with Renaissance detailing inspired by Maybole Castle at the apex. The third bay features a first-floor window only, with a raised wallhead and a corbelled parapet. A vertically-boarded crypt door with a window is located to the left at basement level, accessible by a staircase to a small basement area enclosed by an ashlar cope with a steel railing.

The building has leaded glazing to the hall and aisle, along with 12-pane timber sash and case windows elsewhere, and eight-pane fixed lights to the oculi. The main entrance features a vertically-boarded, two-leaf timber door with arched glazed panels above the head of the arch. A timber entrance door to the offices has a panelled lower half and a glazed upper section with nine panes. The roof is covered in grey slate with ridge tiles, overhanging timber eaves with exposed rafter ends. Cast-iron gutters and downpipes are present, along with hemispherical hoppers featuring rope moulding decoration. A coped stack with a red circular can sits adjacent to the southeastern gable.

The interior features exposed rubble walls with red sandstone ashlar dressings over wainscoting with vertically-boarded panels and a crenellated top. Infilled arched windows are visible in the southern wall. The hall has an open timber roof supported by purlins on hammerbeam trusses resting on stone corbels, while the aisle has triple-apex open timber roofs of A-frame construction on substantial beams. A timber vestibule screen, matching the wainscoting, is situated at the north end of the hall, with two-leaf doors leading to the hall, featuring four-pane glazed upper panels. A triple arcade runs along the eastern side of the hall, incorporating folding panelled timber doors and five six-pane arched windows above. Four bipartite leaded windows are in the northeastern wall. The floor is timber.

A two-storey, three-bay Masonic Hall is attached at the western corner along St John Street.