Former Ammunition Magazine, Northfield Depot, near Invergordon

The former ammunition magazine at Northfield Depot, near Invergordon, was built around 1938–39. This single-storey building has a rectangular plan and is made of reinforced concrete. It features an inner shuttered concrete structure with a shallow pitched roof and 12-pane metal framed windows along the north and south walls. The building is flanked by buttressed outer concrete baffle walls, with earthwork banks for blast defence. There are vehicle loading docks at both the east and west ends, and much of the structure still shows its wartime camouflage paint scheme. It is situated within a small area of existing woodland, which helped to conceal the depot from potential enemies.

The building has double steel doors and small ventilators in each gable end, facing the vehicle loading docks that have concrete platforms at loading height. Access passages through the blast wall, which have metal barred gates, connect the gable ends to the loading docks. The interior retains fixtures and fittings from the time of construction, including lighting and electrical equipment.

Inside, accessed from the doorways in each gable end, concrete piers support the roof, and the space is divided into two rows of partitioned bays for storing munitions. Several steel doors remain in place within the store.