Owen Campbell-Jones was born in Britain in 14 [or 16 - sources differ] February 1894. He studied at the Architectural Association School of Architecture in London and subsequently worked as an architect in London from c.1920.
Campbell-Jones was elected an Associate of the Royal Institute of British Architects (ARIBA) in 1920 and a Fellow of the Royal Institute of British Architects (FRIBA) in 1927. His address was given as Skinners Hall, 9 Downgate Hill, Cannon Street, London in 1939. He died in London in 1982 and is buried in Headley, Surrey.
Projects on which he worked included The London Assurance in King William Street, London; Lloyd's Bank (Head office) on Gracechurch Street, London; Provident Mutual Assurance Corporation on Moorgate Street, London; Merchant Marine Insurance Co. at Cornhil, London; British & Foreign Insurance Co. at Cornhill, London; Bouverie House on Fleet Street, London; British Overseas Bank on Gracechurch Street, London; Westminster Bank on Harley Street, London; Westminster Bank in Frinton-on-Sea, Essex; Westminster Bank in Tonbridge, Kent; Anglo-Egyptian Bank in King William Street, London; Yardley Court School in Tonbridge, Kent; Barclay's Bank in Regent Street, London, Barclay's Bank in Bond Street, London; extensions to the Polytechnic at Battersea, London (1953); and Bucklersbury House at Walbrook, London (1958).