Commanding Officers House

The Commanding Officer's House on Drake's Island is a late 18th-century building that was extended around the 1830s. The ground floor is constructed from slatestone rubble, with the western wing featuring granite quoins and the eastern wing having limestone quoins and a plinth. Both wings have a rendered first floor and dry slate roofs with coped gable ends, along with a rendered axial stack. The house has an L-shaped plan, with the original western wing projecting at the rear and the left-hand wing added in the 1830s. At that time, the original wing was also given a first floor. The ground level is higher at the rear.

The exterior is two storeys tall with an asymmetrical north front featuring six windows arranged in a 3:3 pattern. The three right-hand windows belong to the wide gable of the original wing, and the centre window on the first floor is blind. All windows are 12-pane sashes set on stone sills. Each part has a central doorway with boarded doors and rectangular overlights. There are small louvred openings on both the front and rear gables. The rear elevation is accessed from higher ground, leading to a central first-floor doorway that opens into a gabled porch, flanked by 12-pane sash windows. To the right, there are low first-floor windows and an outshut in the angle. The interior has not been inspected.