[6][7] It officially opened in 1869 in the old Immigration Barracks site on Howe Street with 78 boys enrolled.

In 1916, the school moved to its current location in Mountain Road, Epsom, which was opened by Governor General Arthur Foljambe the Earl of Liverpool.

The school's main block, built in 1916 in the Spanish Mission style, is used for daily assemblies and exhibitions, and it also contains classrooms on its two levels.

[15] The school owns a facility called the VentureLodge located in the township of Ohakune, in the central North Island, which is used by students for camps.

Further to the south again is a concrete block built in the early 1970s, raised on pilotis to give access to the upper playing fields.

[citation needed] Adjacent to the Spanish Mission-style library from the 1920s is the Centennial Theatre (opened 1969) and the swimming pool.

Between the 1970s and 2014-2015, a complex of 'prefabs' adjacent to the Mountain Road boundary evolved, built to house the increasing roll.

[24] Te Ara[25] plans to include a new library, swimming pool and study block located in between the Centennial Theatre and the War Memorial.

[26] Research by the Real Estate Institute of New Zealand shows there is a 30 percent premium ($257,000) on houses in-zone compared to those out of zone.

Both were forced to backtrack after opposition from parents in the overlapping areas, who feared it could ultimately lead to Auckland Grammar shrinking its zone and affecting the resale value of their homes.

[28] Auckland Grammar's requested voluntary donation is the highest for a non-integrated state school in New Zealand.

The introduction of New Zealand Scholarship has been viewed sceptically by the school, and it encourages only the top students to attempt it.

[39] From 2019, the School replaced all external examinations (both Cambridge IGCSE and NCEA Level 1) for Fifth Formers with an in-house preparatory qualification, Pre-Q, set to be "more rigorous than IGCSE", in response to planned reforms to NCEA, abolishing external examinations at Level 1.

It is sung to the melody of the German hymn "Ein feste Burg ist unser Gott" ("A Mighty Fortress Is Our God").

[41][42] The following individuals have served as headmaster of Auckland Grammar School: The following individuals have served as the Chairman of the Board of Governors: The following individuals have served as the Chairmen of the Auckland Grammar School Board of Trustees: As of 2015[update], Auckland Grammar has produced the most All Blacks out of any New Zealand school; it has a total of over 50 former All Blacks.