A programme of historic building recording was carried out by the Colchester Archaeological Trust on eight buildings at the Flagstaff complex (before demolition in 2015 as part of the redevelopment of the complex), part of the decommissioned holdings of Colchester Garrison in November 2014. Construction started on the Flagstaff complex in 1868 and the complex originally served as the headquarters offices and stores for the garrison. The structures included in the historic building record comprise the ‘Annexe’, a late 19th-century building used as offices; FLG 2, an office block dating to 1938; FLG 10, 11, 12 and 13, wagon sheds dating to c1900; and a pair of brick sheds, designated buildings 3 and 3a for the purposes of this report, which also date to c.1900.