In the urban expansion of Gateshead, Deckham was enveloped so that its exact boundaries are difficult to define. The estate had boundaries at Split Crow Road, Old Durham Road, Hendon Road and Carr Hill Road but documents indicate that Deckham stretches to Durham Road in the west and the streets adjoining Hendon Road as far north as the Bankies open space at Mount Pleasant. In 1974 Deckham was incorporated into the Metropolitan Borough of Gateshead by the Local Government Act 1972. Until its implementation, Deckham was part of County Durham. It is now bordered by settlements which are part of the metropolitan borough. These are Sheriff Hill to the south, Low Fell and Shipcote to the west, Gateshead to the north and Felling and Carr Hill to the east.