Hangar No. Four is a World War I hangar relocated from Norfolk (Hampton Roads).  The hangar was dismantled at Norfolk in 1931 and erection at Lakehurst was completed in early 1932.  The hangar was known as the non-rigid hangar until 1942, because it was erected for non-rigid airships to alleviate crowding when two rigid airship occupied Hangar No. One.  After completion, the hangar was used at various times by the airships J-3, J-4, K-1, ZMC-2, G-1, L-1, TC-13 and TC-14.  The hangar was frequently used when two rigid airships with railroad masts and stern beams were housed in Hangar No. One.  Hangar construction is steel with exterior doors at the west end only.  Hangar No. Four is located northeast of Hangar No. One near the station's east boundary road.  Railroad tracks once ran from Hangar No. One to Hangar No. Four.

    Due to the height, only the smaller, older non-rigid airships could use the hangar.  The K-2 airship, the first modern patrol airships constructed in 1938, could only use the hangar if the top fin were to be removed.   The hangar was used by airships until January of 1940 (about the time the Los Angeles was completely dismantled and removed from Hangar No. One).  Hangar No. One provided sufficient space for all of the Navy's non-rigids after this date until 1942.   During World War II, the hangar was occasionally used by airships, but was used primarily for the free balloons used in training.  The main use of the hangar since then has been for storage.

    In June of 1941, construction was started on Hangars No. Two and No. Three next to (and south of) Hangar No. One.  For simplification, the hangar from Norfolk was designated as Hangar No. Four.