William Warman was articled to William Cooper (?-1901) in London, England. He also attended the South Kensington Schools. He subsequently worked as an architect in London in the early years of the twentieth century. Drawings and plans of a house designed by him 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.112).
Warman's address was given as 43, Salehurst Road, Crofton Park, London in 1912' and "Bodiam", 62, Arthurdon Road, Brockley, London in 1914.
Note: As no further information has been traced about Warman after 1914 it is possible that he was one of the casualties of World War One
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