St. John's was designated a pro-cathedral in 1924 while Saskatoon remained part of the Anglican Diocese of Saskatchewan with its cathedral in Prince Albert.

The present brick, Tyndall stone and terra cotta structure was raised in an unornamented neo-Gothic style.

The rood screen, pulpit, lectern, and high altar are made of Carrara ware (Doulton white terra cotta resembling Italian Carrera marble).

[1][2][3] The building's foundation is made of fieldstone (which includes granite, gabbro, diorite, gneiss, schist, and dolomite).

The seating capacity has been reduced to 800 with the removal of pews at the liturgical west end and to accommodate a nave altar at the crossing.