The school is situated on a site covering two blocks in mid-Christchurch next to the Avon River and adjacent to Hagley Park, which it uses for its playing fields.

The Boys' and Girls' School combine for chapel services, orchestra, assemblies, some sports events, operettas, social functions and share common playgrounds.

Pupils active in the arts and in sport with the school being a part of the cricket, hockey, and tennis competitions.

Canon Roger Couper, Headmaster 1984–2001, and published by the Cathedral Grammarians' Association to celebrate the 125th anniversary of the school.

The mayor's family home in Cashel Street was called Inveresk after his birthplace near Edinburgh in Scotland.

A further application some years later in 2001 to demolish part of the building to make room for a two-storey structure was withdrawn after opposition was received.

[7] Inveresk closed after the 2011 Christchurch earthquake and after renovation and structural upgrade, it was opened again on 25 May 2012 by rugby coach Todd Blackadder and Bishop Victoria Matthews.