South Lodge, Wedderburn Castle

South Lodge at Wedderburn Castle is an early 19th century structure that has undergone later alterations and additions. It serves as a gateway to the center, flanked by a coped quadrant wall and single-storey buildings, with the lodge located to the southeast of the gateway and featuring an attic. The exterior is made of droved ashlar with polished ashlar dressings, while the rear of the buildings is constructed from rubble with broadly droved dressings. There is also a line-rendered addition to the lodge.

On the west elevation, there is a round-arched carriage opening at the center, flanked by square-plan pedimented piers with round-arched panels, all made of grey sandstone. The coped quadrant walls connect to the gabled lodge elevations, each featuring a round-arched recess at the center and a band course at the eaves height. The northwest lodge has a diagonally-positioned ashlar coped stack at the apex, which was formerly also present on the southeast side.

The north elevation of the northwest building includes a double cart-shed opening on the left and a window opening on the right. The southeast building has a boarded door on the left and a window on the right. There is a tall coped rubble wall projection from the outer left that turns to run east-west.

On the east elevation, the northwest building features a boarded two-leaf door at the gable head and a blinded round opening to the ground right of center. The southeast building has a door in the rubble wall on the outer right, a modern two-leaf glazed door at ground level in the left bay, and a matching door at the first floor above, which breaks the height of the flanking walls and gabled structure. There is also a modern single-storey lean-to addition set back to the left, featuring a two-leaf glazed door in the right bay and a window in the center and left bay.

The lodge has four-pane timber sash and case windows, and each building has a slate roof. The northwest building has a brick coped stack at the gable on the east elevation, while the southeast building features a can to the wallhead on the outer left of the east elevation.

The interior was not seen in 1995. The gates are simple iron gates with arrow-headed shafts and a cast-iron bird at the center of each gate.