Hangar no. 6, Langford Lodge, 97 Largy Road, Crumlin, Co Antrim

A large single-storey gabled hangar aligned approximately north-south, with lower cross-gabled five-bay blocks flanking it on the east and west sides. The main hangar has full-width sliding steel-plated doors to each end, now no longer moveable, with panelled asbestos sheeting to the gables above and to the long sides above the cross-gables. Some asbestos panels are broken or missing. Corrugated asbestos sheeting covers the roofs. The lower flanking blocks have brick side walls to north and south, with corrugated asbestos cladding panels above, surmounted by flat asbestos panels. Asbestos rainwater goods and sliding iron-plated doors are present, with corrugated asbestos sheeting to roofs. The gables to the east are entirely of brick, with one later door inserted. The gables to the west resemble the gables of the large hangar on a smaller scale.

Built in 1942 or 1943 as an aircraft hangar for Langford Lodge airfield, this building housed the machine shops and propeller testing and overhaul facilities. The airfield was originally opened in 1941 as a Satellite Landing Ground established for the temporary storage of new aircraft under the RAF's Maintenance Unit (No. 23) at Aldergrove. It was one of five such facilities in Northern Ireland allocated to RAF Aldergrove and one of approximately fifty Satellite Landing Grounds in the United Kingdom. The site was later developed into an Air Depot providing complete logistical back-up facilities to the 8th Air Force of the United States Army Air Force for the assembly, modification, repair and storage of aircraft. As such developed, it became one of only three primary air depots in the UK, alongside Burtonwood and Warton in Lancashire. The Langford Lodge base closed in 1945, was briefly used by the RAF's No. 5 Air Navigation School from 1952 to 1953, and was acquired by the present owner in 1958.

The building is historically significant for its association with the Second World War and is of exceptional rarity, being reportedly one of the few surviving examples and possibly the only surviving example of a wartime hangar in the United Kingdom. The building stands within a former airfield now mainly used for agricultural and manufacturing purposes, with concrete areas to the north, west and around the perimeter, and grassed areas beyond to the south and east.