The fonds contains materials pertaining to the life of Jules Janco, with an emphasis on his architectural career. This includes transcripts, diplomas, and letters of recommendation issued from the architecture school he attended along with his brothers in Switzerland, letterheads and business cards from Janco's professional collaboration with his brother Marcel Janco, professional notes and memos, a number of architectural sketches of homes and buildings in Romania and Palestine, and photographs and brochures pertaining to architectural projects Jules Janco was involved in--most prominently, Ștrandul Kiseleff (the Strand) and the Bucegi Sanatorium. A number of work-related objects, including scissors, a miniature magnifying glass, and spectacles, are also found in the fonds.
Personal records from Janco's childhood and young adulthood in Romania, through to his marriage to Mizzi Packer and emigration to Canada, can also be found in the fonds. This includes birth, marriage, and death certificates, citizenship records and passports, some personal and financial correspondence, and a number of coupon bonds issued to Janco and his father, Hermann Zui Janco. A large number of photographs document family trips around Romania and to France; some photographs from Janco's school days, including scenes with peers, are in the fonds.
Some research Janco's own family members conducted about his life is also contained within the fonds. This includes a map of Bucharest demarcating sites of Janco's projects, a series of tapes in which Janco has voiced over his own life narration, and documentary footage on VHS compiled by a filmmaker.