As at 1 July 2003, St Andrew's Cathedral is one of the finest Gothic-revival church buildings in New South Wales and is the pre-eminent church building within the Sydney Anglican Diocese. The building represents the aspirations of the Colony and was the focus of much of Sydney life both during and after its construction. The completion of the Cathedral building was a major achievement for both the church and the City of Sydney. The building has high spiritual significance for both Anglicans and the wider community. It has been the "State" church for many major events. The building group has high aesthetic significance as a finely crafted and detailed group of structures. The Cathedral interior has high aesthetic value, even in its altered form, containing much of the original furniture and fittings including the Hill organ. The Cathedral contains a very fine and significant set of stained glass windows that predominantly date from the time of construction. The Cathedral has historic significance as it has reflected the growth of the Anglican Church and changes in Anglicanism and for its associations with prominent church and civic persons.