Former Ammunition Magazine, Northfield Depot, near Invergordon

The former ammunition magazine was built around 1938–39. The building is a single storey, rectangular-plan, reinforced concrete former ammunition store. The building comprises an inner shuttered concrete structure with a shallow pitched roof and 12 pane metal framed windows along the north and south walls. There are also buttressed outer concrete baffle walls, with earthwork banks to provide blast defence. A vehicle loading dock is located at both the east and west ends of the structure and much of the structure retains its wartime camouflage paint scheme. The magazine was built within a small area of existing woodland, which helped to camouflage the depot from the enemy.

Double steel doors and small ventilators in each gable end of the building face towards the vehicle loading docks which have concrete platforms at loading height. Between the gable ends and the loading docks are access passages through the blast wall which have metal barred gates. The building retains fixtures and fittings from its date of construction, such as lighting and electrical equipment.

The interior of the store, seen in 2015, is accessed from the doorways in each gable end. Concrete piers support the roof, and the interior is subdivided into two rows of partitioned bays for storing munitions. A number of steel doors remain in situ on the store.

In accordance with Section 1 (4A) of the Planning (Listed Buildings and Conservation Areas) (Scotland) Act 1997 the following are excluded from the listing: the two western magazines of the depot group.