George Spencer Hoffman [also known as G. Spencer Hoffman] was born at Coombe Lodge, Putney, Surrey [now London], England on 17 September 1875. By 1881 he had moved to Wandsworth, Surrey [now London]. After studying at Trinity College, Cambridge, he was articled to Sir Arthur William Blomfield (1829-1899) and Arthur Conran Blomfield (1863-1935) of A. W. Blomfield & Sons from 1897 to 1900.
He commenced independent practice as an architect in London in 1902 and from 1902 was in partnership with Edwin Otho Sachs (1870-1919). They submitted a design for a bungalow in the Daily Mail Architects Competition for Labour-Saving Bungalows in 1922
In 1911 Hoffman was elected a Licentiate of the Royal Institute of British Architects (LRIBA). By 1939 he had retired from the profession.
In addition to his work as an architect, Hoffman was also a painter and graphic artist. He exhibited once at the Royal Academy in London in 1922.
His address was given as Cambridge Lodge, West Hill Road, Wandsworth, Surrey on 1881; The Dial House, 3 West Hill Road, Southfields, Wandsworth, Surrey in 1901 and 1928; and Rock Cottage, Apuldram, near Chichester, Sussex in 1939 and 1950. He died on 9 January 1950.
Directory of British Architects 1834-1914. Compiled by Antonia Brodie, et al. Volume 1: A-K. London; New York: British Architectural Library, Royal Institute of British Architects/Continuum, 2001