[1] Parts of the old school building can be seen adjacent to All Saints' Church near the north end of Northallerton High Street.

At the outset of the Second World War it provided space for evacuee children from Sunderland for some months.

In 1973 it became a comprehensive but maintained the name Northallerton Grammar School and was administered by the North Yorkshire local authority.

[7][8] In April 2018, a new headteacher, Chris Drew, was appointed in light of the school being designated as "failing" by Ofsted in an earlier report.

Soon after Ms Rahn's appointment, the school secured £8.7 million from the Department of Education to redevelop the old Allertonshire site on Brompton Road, Northallerton.

[10] The refurbished site, alongside the newly constructed sixth form centre, opened to students in September 2021.