South Block Cottage, Kelburn Country Centre, Kelburn Castle, Fairlie

South Block Cottage is part of a single-storey former home farm complex dating from around 1760, set within the grounds of Kelburn Castle Estate near Fairlie and positioned prominently on the principal south approach drive to the castle, to its southwest. The complex was remodelled in 1979–80 to serve as the visitor centre for Kelburn Country Centre.

The complex is arranged as three blocks in a U-plan, with the principal elevation facing west. In its original form it comprised a steading, stables, dairy, byre and estate offices. The symmetrical west elevation features a five-bay central block flanked by the single-bay ends of the north and south ranges. All three blocks share a consistent architectural language: channelled ashlar piers with ball finials at the corner angles, arched openings with keystones, raised margins, and piended (hipped) roofs covered in grey slate. The rear, east-facing elevation of the central block has a forestair and a pedimented loft door. The courtyard-facing elevations are mostly harled, with the north and south ranges stepping up the slope of the site; these inner faces have irregularly arranged openings with mostly small-paned glazing in timber-framed windows. A piended roof cottage addition to the east of the south block was added around 1880.

The flanking ranges originally contained stabling, a coach house, a dairy and possibly a laundry and servants' accommodation, arranged around the central courtyard. The classically detailed west-facing elevation, with its channelled corner pilaster piers and large ball finials, was expressly designed to complement the setting of the castle, which had itself been extended in the early 18th century. The style of these corner pilasters and finials is consistent with the gatepiers found elsewhere on the Kelburn estate, including the gatepiers to the north of the castle courtyard and the south entrance gatepiers.

The interiors, as partly inspected in 2016, have been largely remodelled as part of the conversion to the visitor centre. Some internal fixtures and fittings associated with the building's former use as a stable and home farm survive within the outer ranges.

The architect of the complex is unknown, but the building is a good surviving example of the early phase of agricultural improvement in Scotland, when farm buildings were being redesigned on ordered, symmetrical plans in the classical style — influenced by the Enlightenment's emphasis on classification and order. Comparable examples of this early model farm tradition include the Great Barn complex of around 1750 at Inveraray Castle, Argyll, and the Culzean Castle Home Farm of 1775. The Kelburn farm is a relatively modest example in terms of scale, but its unified classical form survives largely intact and illustrates the ambitions of a modernising 18th-century landowner seeking both practicality and architectural effect.

The complex continues to occupy a prominent position within the Kelburn Castle policies on the south approach drive. Kelburn Castle itself is among the oldest ancestral country seats in Scotland to have been continuously inhabited by successive generations of one family — the Boyle family (formerly de Boyville), who have held the estate since the 12th century. The estate has a prominent coastal setting to the south of Largs, with views across the Firth of Clyde to the Isles of Cumbrae and Bute and southwest to Arran. The Kel Burn runs through the estate, passing through a wooded ravine and over a 15-metre waterfall to the southwest of the castle.

The home farm complex appears on the first edition Ordnance Survey map surveyed in 1856, already occupying substantially the same U-plan arrangement as today. The U-plan form has been altered by later additions to the east, but the 18th-century core remains clearly identifiable. The additions to the north block and the buildings to the east of the courtyard are excluded from the listing under Section 1(4A) of the Planning (Listed Buildings and Conservation Areas) (Scotland) Act 1997.

The listing was previously recorded under the name 'Kelburn Former Stables and Cottages (Visitor Centre)' and was revised in 2016.