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, situated on the south approach drive to the southwest of Kelburn Castle, Fairlie. The complex was originally built to serve as steading, stables, dairy, byre and estate offices, and was remodelled in 1979–80 to form the visitor centre for Kelburn Castle Estate.

The complex is arranged as three blocks in a U-plan, with the principal elevation facing west. This west-facing front is symmetrical, comprising a five-bay central block flanked by single-bay ends of the north and south blocks. All three blocks share consistent detailing: channelled ashlar piers with ball finials at their corner angles, arched openings with keystones, raised margins, and piended (hipped) roofs finished 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; their openings are irregularly arranged and fitted 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 classically detailed west elevation, with its channelled corner pilasters and large ball finials, was expressly designed to complement the setting of Kelburn Castle, which had been extended in the early 18th century. The form of the corner piers is consistent with the style of gatepiers elsewhere on the Kelburn estate. The building sits prominently on the route of the principal south approach drive to the castle, a position it has occupied since the drive was established in the later 18th or early 19th century.

The U-plan layout of three blocks arranged around a central courtyard is typical of estate stable offices and small-scale home farm complexes modelled on the early Improvement-era farm designs that became widespread after around 1740. The flanking ranges at Kelburn contained stabling, a coach house, a dairy, and possibly a laundry and servants' accommodation. The design reflects both practical need and the ambitions of a modernising landowner: the symmetrical, pavilion-flanked arrangement with pyramidal roofs imposes a uniform sense of architectural order. The complex is a relatively modest example by the standards of the period — built by an unknown architect in a simplified classical style — but it stands alongside grander Scottish model farms of the same era, such as the Great Barn complex of around 1750 at Inveraray Castle, Argyll, and the Culzean Castle Home Farm of 1775.

The mid-18th century saw widespread changes in farming methods and animal husbandry that drove new, ordered approaches to the layout of farm buildings. Like virtually every other major building type of the period, farm design was influenced by the desire for classification and order stimulated by the Enlightenment. Kelburn's home farm is a good surviving example from this early phase of agricultural improvement, and its unified classical form remains largely intact.

Kelburn is among the oldest continuously inhabited ancestral country seats in Scotland, having been in the possession of the Boyle family (formerly 'de Boyville') since the 12th century. The castle 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 the Isle of Arran. The Kel Burn runs through the estate, passing through a wooded ravine and over a 15-metre-high waterfall to the southwest of the castle.

The interiors were 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, based on an inspection partly carried out in 2016.

The following are excluded from the listing under Section 1(4A) of the Planning (Listed Buildings and Conservation Areas) (Scotland) Act 1997: additions to the north block, and buildings to the east of the courtyard.

The building was previously listed as 'Kelburn Former Stables and Cottages (Visitor Centre)'. The statutory address and listed building record were revised in 2016.