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. This maintains the continuity of the system of closed spaces that surround the cathedral on three sides. The base consists of
Brisbane tuff, the ground floor to first floor's sill is made of sandstone and above this in brickwork with two stone
string courses. The roof is high pitched and the windows are six paned pivot hung
sash windows. The massing of the building is centred on the service tower which has radiating wings. The tower has three levels and a basement while the remainder of the building is two storeyed. 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. Openings are a combination of square headed and semi-circular, segmented, and Gothic arches. It is evident that Powell was fond of ornamental rainwater heads. On the cathedral elevation there are two rainwater heads with arms extending five feet on either side, giving the appearance of a cross. The entrance is rather insignificant and opens into the
vestibule which is paneled in dark oak timber. There are private rooms on the cathedral side and small wards on the other, which open onto a wide
balcony. The nurses’ quarters are in a two-storey wing of Eton House, which is just adjacent to the hospital. A children's wing was added in 1940 by John Darnell and the design is to blend with the main hospital. Although St Martin's is arguably not the most practical design for a hospital, it was mentioned that Powell made the plan to suit the elevation. 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.
Arts and Crafts elements are clearly evident, and visually there are many similarities with the house most identified with that movement in the United Kingdom, the
Red House by
Philip Webb.
Gothic elements are also present and St Martin's complements the other buildings which form the cathedral group. Internally almost all the evidence of the building's use as a hospital has been lost in its change to office and residential use. Although the joinery has been retained, the northern wards and central corridor have been combined into one large office area and
suspended ceilings installed. The original top floor kitchen has been converted into living quarters. The southern
verandah is enclosed, and a
fire stair has been constructed behind the facade facing Ann Street. == Heritage listing ==