The plans for the enlarged church included the bell tower, Blessed Sacrament Chapel, large sacristies and a crypt. The extensions were consecrated by Archbishop Cahill and the extended St Christopher's became the cathedral church of the Archdiocese of Canberra and Goulburn, superseding St Peter and St Paul, Goulburn. In June 2008, under the direction of Archbishop Mark Coleridge, the cathedral was refurbished to mark the diamond jubilee of the archdiocese.
The plans for the expanded church included the bell tower, Blessed Sacrament Chapel, spacious vestries and a crypt. The expansions were blessed by Archbishop Cahill and the enlarged St Christopher's became the main cathedral of the Archdiocese of Canberra and Goulburn, replacing St Peter and St Paul, Goulburn. In June 2008, under the leadership of Archbishop Mark Coleridge, the cathedral underwent renovations to celebrate the diamond jubilee of the archdiocese.