Happendon Lodge

Happendon Lodge is a castellated gatehouse and lodge, likely designed by architect William Burn and dated 1851. The building features stugged and snecked ashlar with polished dressings, and all walls are topped with crenellated parapets above a string course. The tall, square-plan gatehouse has a rib-vaulted interior and round-headed carriage arches with moulded reveals, which are recessed under moulded depressed relieving arches. A corbelled round turret and a tall octagonal angle tower are present, with a door on the west face that has a pointed head and moulded reveals. Decorative cast-iron gates display the Douglas arms above.

To the west, there is a two-storey lodge that includes a projecting square corner tower and retains some shouldered-headed windows. The ground floor window on the left has been altered, and there is a modern window above it. The building has a slate roof with a bold corniced stack, and a low flat-roofed single-storey projection extends northwards from the west tower. A screen wall extends eastwards from the gatehouse, linking a small square tower and terminating at a square pier.