Sir Owen Williams (1890-1969) was a British architect and engineer, responsible for a number of key modernist buildings and landmarks in the UK. For Williams, who was not classically trained as an architect, architecture and engineering were inseparable disciplines.

Williams undertook an engineering degree at the University of London in 1907, at the same time as completing an apprenticeship with the Electrical Tramways Company. Upon the completion of both, Williams assumed a position as an engineer and designer with the Trussed Concrete Company before starting his own firm consulting on concrete structures.

Although he was best known for his public buildings and infrastructure systems, Williams completed a number of housing projects both before and during the Second World War, including an apartment block in Stanmore. Following the Second World War, Williams worked on developing the first plan for Britain’s motorway system, and went on to become the principal engineer for the Gravelly Hill Interchange (known commonly as Spaghetti Junction).