Etched into the glass of each door leading to the portico is an Iona Cross, sometimes called a Celtic cross. These crosses tell of the Scottish link with the Presbyterians of Southland. The cross is the type used by the early Scottish Christians on the island of Iona, off the coast of Mull, Argyll. The circle is an emblem of eternity, and suggests the eternal quality of redemption.

Above the doors, etched into the glass, is a representation of the symbol of the Presbyterian Church of Aotearoa New Zealand, the burning bush. This originates from the Old Testament book of Exodus where an angel of the Lord appeared to Moses in a flame of fire in the midst of a bush and, as Exodus records, the bush burned but was not consumed.

In the north wall of the portico are nine small stained glass windows, three provided by the estate of a former choirmaster of the church, William Quinn, and six gifted in memory of William and Eliza Asher.