The south and north aisles - either side of the nave - were added in the 14th and 15th centuries respectively in order to accommodate the growing population of Oxford.

Most notably, during the 46 year ministry of Canon Alfred Christopher, a highly regarded leader from 1859 to 1905, the north and south chancel aisles and the vestry were added.

The pews were removed to create more seating room for a growing congregation, under-floor heating, carpet, Jerusalem stone tiles, wood flooring, and a state of the art AV system with projector screens and television monitors were installed to create a modern venue for a living church.

In 2006 St Aldate's helped to coordinate an event in Oxford that brought together more than 30 churches in the city for an open-air service in Broad Street on a Sunday morning in June.

In June 2009, Channel 4 broadcast a documentary, Revelations - How to find God, on the subject of the Alpha course held at St Aldate's earlier that year.

[1] The programme is one of eight episodes in the series and was made by Jon Ronson, who was "afforded complete access"[2] and compiled the final product from around 120 hours of footage.