
John Charles Stephen Mummery was born in Iver, Buckinghamshire, England on 20 July 1862. Between 1878 and 1881 was articled to Henry Hall (1862-1909) at his office in London and then remained with him as his principal assistant. He also attended the Architectural Association Schools and the Royal Academy Schools.
He qualified as an architect in 1888 and later that year was elected an Associate of the Royal Institute of British Architects (A.R.I.B.A.). He subsequently worked as chief assistant to Rowland Plumbe (1838-1919). By 1907 he had formed a partnership with Charles Lionel Fleming-Williams (1879-1919) as Mummery & Fleming Williams. The practice designed the Whitefield Tabernacle on Alexandra Park Road, London in 1907
In 1913 Mummery and Fleming-Williams joined Plumbe in partnership as Rowland Plumbe & Partners. Following the death of Plumbe and Fleming-Williams in 1919 Mummery continued the practice which eventually closed in 1933.
Mummery was appointed architect to the Edmonton Board of Guardians in 1910, and served as architect to the Tottenham Burial Board. He was also architect of the Wood Green Unitarian Church, Newnham Road (c.1901), where his father, the Rev. John Stephen Mummery (1825-1910), was the pastor.
In addition to his work as an architect was a keen semi-professional photographer and a member of the North Middlesex Photographic Society. He served President of the Royal Photographic Society from 1907 to 1909.
His address was given as 34 Alfred Place, Bedford Square, London in 1888; 19 Camden Street, St Pancras, London in 1891; 81 Pellatt Grove, Wood Green, London in 1901 and 1921; and 12 Leamington Road, Bournemouth, Hampshire [now Dorset] in 1939 and 1949
He retired to Bournemouth, Hampshire [now Dorset] in the 1930s. He died at the junction of Ashley Road and North Road, Bournemouth on 17 January 1949
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’. RIBA Journal, vol. 56, 1949, p. 244.