Dennis Hill was born in Newcastle upon Tyne, Northumberland, England in c.1878 and was articled to Richard John Leeson (1850-1914) and attended classes at the Architectural Association in London. He subsequently practised as an architect in Newcastle-upon-Tyne, England and was in partnership with Matthew Horner Graham (1861-?) as Graham & Hill. The partnership was dissolved in 1914.
Hill evidently served with distinction in World War One as he was awarded the Military Cross and the Croix de Guerre. He died in Highgate, Middlesex on 10 April 1946
As partner of Graham and Hill: — "Chronicle" Office, Newcastle-on-Tyne; County Hotel, Newcastle-on-Tyne. [Source: Who's Who in Architecture 1923]
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
Who's Who in Architecture 1923. Edited by Frederick Chatterton. London: The Architectural Press, 1923