In 1791 the House of Correction was built outside Northleach on land just west of Fosse Way. It was a new prison designed by the architect William Blackburn on principles advocated by the prison reformer Sir George Onesiphorus Paul. Petty sessions were held at the prison, serving a Petty sessional division whose extent was confirmed in 1836 as 25 parishes. By 1841 a detachment of the new Gloucestershire Constabulary was based at Northleach, and a women's wing was added to the prison in 1842. In 1857 the prison was reduced to holding only remand prisoners, and part of the building was converted into the police station. In 1859 part of the keeper's house was converted into the petty sessions court.