[1] St Martin's House was built as a hospital by the Anglican Church as a memorial to those who had fought in World War I.

[1][3] The hospital was run by the Sisters of the Sacred Advent to care for the sick, and contained seven main wards, single rooms and two operating theatres.

[1] Powell designed it with a close; however it was proven to be irrelevant in some ways as it cuts off air ventilation to the patient's room.

In 1945 a statue of St Martin, designed by William Bustard and crafted by Jack Muller was set in the Ann Street wall of the hospital.

[1] Recently the building was renovated, and in November 1990 St Martin's House was opened as the administrative headquarters for the Anglican Diocese.

[1] St Martin's House is built on stone foundations with external walls of brick with sandstone facings, and is roofed with terracotta shingle tiles.

The building is organised in plan so as to create a series of protected courtyards around the south transept of St John's Cathedral.

The facade oriented towards the cathedral is the most ornate, with a conical roof over the operating theatre, but that towards the south west with its cloister is also an important part of the building.

[2] The exterior is enhanced by the quality of the detailing including: the corbelled brickwork, cruciform rain-water spouts, and the statue of St Martin of Tours in a niche in the western gable.

Although the joinery has been retained, the northern wards and central corridor have been combined into one large office area and suspended ceilings installed.

St Martin's House is significant as a highly accomplished building displaying characteristic Arts and Crafts massing, fine detail and workmanship, and a range of major materials.

St Martin's House is significant as a highly accomplished building displaying characteristic Arts and Crafts massing, fine detail and workmanship, and a range of major materials.