Castlebank, Lanark

Castlebank is a classical country house, predominantly from the mid 19th century, with some earlier elements and early 20th century additions. It is mainly three storeys high and has an 11-bay, roughly rectangular, asymmetrical layout, featuring Tudor revival additions. The building has a balustraded parapet with urn finials at the wallhead of the main blocks, along with projecting windows and porches. The exterior is finished in ashlar-lined stucco with ashlar dressings, and includes a deep base course, a band course, and remnants of a string course that was originally an eaves course before an extra storey was added. The corners are accentuated with rusticated quoins, and the fenestration is generally regular, with ashlar margins. Some ground floor openings have hood moulds with label stops, while some first floor windows are corniced, and there are pedimented dormers with finials.

On the principal elevation, there is a three-storey, three-bay core block with a projecting single-storey porch. This porch is flanked by projecting two-storey bays that feature bipartite windows. There are also two- and three-storey additions that step back to the right and left.

The windows are predominantly plate glass set in timber sash and case frames. The gable stacks are ashlar-coped, with red and yellow clay cans, and the roofs are covered with grey slate and zinc ridges.

The stable court outbuildings date from the early to late 19th century and include a mix of single and two-storey piend-roofed stable and coachhouse ranges with timber boarded carriage doors. These are constructed of squared rubble with droved ashlar dressings and also feature grey slate roofs with zinc ridges.

The stable court entrance, built in 1904, is a single-storey, curved U-plan structure in the Scottish Baronial style, enclosing the eastern end of the service court. It has a round-arched pend in a crowstepped gable and is mostly made of squared and coursed sandstone with droved ashlar dressings. The entrance features two-leaf timber-boarded gates, a clock, and a date stone above the ball-finialed gable. There are curved legs to the right and left, with a pedestrian door on the right and timber-boarded doors to the courtyard. A weathervane sits at the apex of the gable, and the gablehead stacks have octagonal yellow clay cans, topped with grey slates.