Harry John Worrow was born in Shadwell, London, England in 1877. He was articled to Christopher Mitchell Shiner (1857-1944) in 1897 and remained with him as his assistant. He also attended classes classes at the Architectural Association Schools in London. After working as an assistant to Robert Langton Cole (1858-1928) he formed a partnership with his brother, Frederick Isaac Worrow (1880-1942) as H. & F. Worrow in 1907. The practice had an office in Basinghall Street, London.
Drawings and plans of a house designed by them are illustrated in Designs for One Hundred Ideal £1,000 Houses. Being copies of the hundred best designs entered in the 1912 Daily Mail Architects' Competition (1912 p.123).
H. J. Worrow was elected a Licentiate of the Royal Institute of British Architects (LRIBA) in 1912 His address was given as Victa, High Beech Road, Loughton, London in 1912; and 70 Basinghall Street in 1912 and 1939. He died on 3 March 1952.
Directory of British Architects 1834-1914. Compiled by Antonia Brodie, et al. Volume 2: L-Z. London; New York: British Architectural Library, Royal Institute of British Architects/Continuum, 2001
'Obituary'. The Builder vol. 182, 28 March 1952 p. 490