A central nave, with a timber vaulted roof supported by hammerbeams, has an aisle on each side and a rose window dominating its western end.

The State Heritage Register assessment describes the intersecting beams over the crossing as "impressive in their lightness and grace" and providing a "subdued but elegant decoration to the building".

St George's Cathedral has become noted for its innovative and controversial theological teaching, popular preaching, commitment to inter-faith worship and music.

However, the bells were only rung infrequently for the subsequent decades due to a combination of the lack of proficient ringers and for structural concerns in the tower itself.

[6] Following a restoration appeal the cathedral had its original peal recast by John Taylor & Co in 1975 and hung a year later in a cast-iron and steel frame with the new tenor at 560 kilograms (1,200 lb).

Tonal revisions and refinements were carried out in 2008/09 by the South Island Organ Company (SIOC) of Timaru, New Zealand.

This enhancement is dedicated to the memory of twelve former cathedral choristers who died on active service during the Great War.

A notable feature of the west organ was the addition, also by SIOC, of a solo and horizontal fanfare trumpet, voiced in the French symphonic school.

Named "Ascalon" after the lance used by St George to slay the dragon, the artwork aims “to evoke a sense of righteous power and victory over a force of darkness and oppression”.

The Cadogan Song School was built between February 2016 and August 2017 and is located between the cathedral and the hall, and to the west of the deanery.

The 1859 deanery, which adjoins the cathedral on the corner of Pier Street, had external restoration work in 2010 and 2011 and a much needed upgrade on the internal fabric in 2017.