Cumstoun House

Cumstoun House is a large Tudor Gothic mansion designed by architect Thomas Hamilton between 1827 and 1829, with later additions and alterations made by architects Peddie and Kinnear in 1896. The original design featured a nearly symmetrical tripartite plan, but the alterations by Peddie and Kinnear have obscured the original entrance front. Some notable interiors from Hamilton's design still remain.

The exterior is constructed of coursed rubble with polished red sandstone margins and details. It features square or octagonal buttresses at the corners that rise to castellated turret-finials, creating a lively roofline on the northern elevation. This elevation was originally nearly symmetrical, with two-storey projecting gabled end bays and a recessed three-storey central bay that has a canted second floor. Following the alterations, the left bay was raised to three storeys and features a boldly projecting two-storey bay. The original porch, made of polished red sandstone with a deep parapet, was moved from the centre bay to the right bay and replaced by a single-storey projecting passage.

On the southern garden elevation, Hamilton's design maintained near-symmetrical proportions, with a three-storey central bay flanked by two narrower two-storey bays, the left bay being gabled. The central bay has a ground floor of polished red sandstone and a two-storey projecting canted window with an embattled parapet. The first and third-floor windows are Tudor arched with original small-pane and Y-tracery glazing. The alterations introduced a large recessed single-storey wing to the left, while the right bay was widened and raised to three storeys, featuring a tripartite window on the ground floor and a bipartite window on the third.

The eastern elevation consists entirely of work from 1891, featuring a three-storey structure with a two-storey canted window to the left. The building has polished ashlar bands between floors, deep plain parapets, and slate roofs, with axial stacks that have tall grouped octagonal cans.

Inside, the drawing room remains largely unaltered from Hamilton's original work, showcasing Gothick cusped woodwork around the window ingoes, a simple marble chimneypiece, an anthemion frieze, and a well-crafted door with cusped panelling. The dining room is also relatively unaltered, featuring a similar cornice and marble chimneypiece, while the majority of the other interiors reflect the work of Peddie and Kinnear.