The main effect of the change was that the Hillesley and Tresham area was transferred from Northavon to the neighbouring District of Stroud in Gloucestershire.

[4] Following a review by the Local Government Commission for England, both the County of Avon and District of Northavon were abolished on 1 April 1996.

Northavon was merged with the neighbouring Borough of Kingswood to form the unitary authority of South Gloucestershire.

It was abolished ahead of the 2010 general election, with the area being split between the constituencies of Filton and Bradley Stoke and Thornbury and Yate.

In 1986 Northavon District Council built a civic centre on Castle Street in Thornbury, at the corner with Stokefield Close.