Castleton House Including Gatepiers

Castleton House, built around 1830 and incorporating earlier materials, features alterations made by architects Dick Peddie and Kinnear in 1875, along with a turreted entrance wing added in 2000 by Crera and Partners. This picturesque Victorian house has two storeys and an attic, with an irregular plan that includes a central two-bay section, an advanced gabled wing with pointed-arch attic windows and a lean-to greenhouse to the south, and a Scots-Baronial entrance wing to the north. The exterior is finished in painted harl with polished sandstone ashlar dressings and raised margins, and it has overhanging eaves with scalloped timber bargeboarding throughout.

The principal (east) elevation features a central two-storey, two-bay block with a canted tripartite window on the right and a stone tablet above dated 1875. The first-floor windows break the eaves and have finialled dormerheads. To the left, there is a three-storey gabled wing with a wide canted window topped by a cast-iron balcony, a tripartite window on the first floor, and tripartite pointed-arch windows above, all with diamond lattice glazing and a spike finial at the gable apex. A single-storey outshot with a balustraded parapet is located to the right. The turreted wing on the far right is designed in a Scots-Baronial style, featuring a conical cap entrance stair tower and a corbelled-out corner turret at the northeast angle, both topped with ball and spike finials. The south elevation includes a large timber lean-to conservatory and a gabled porch outshot to the left. The rear (west) elevation has four gabled ends arranged in a stepped formation.

The property also includes a range of converted outbuildings, such as a detached stable block at the rear of the house, which was converted into a self-contained flat in 2003, and a boathouse with a later timber parapet facing the lochside.

Inside, the drawing room features an arched stone fireplace and early timber panelling throughout, with a fine plaster cornice added around 2000. There is a variety of marble and carved hardwood fireplaces in other rooms, and an unusual leaded glass cupola in the main stairwell, adorned with decorative coloured glass roundels. The windows are predominantly timber glazed sash and case, and the roof is covered with grey slate, featuring a variety of ridge stacks, some with tall octagonal clay cans.

The gatepiers are square and chamfered, with keyhole carvings and swept pyramidal caps.