Gannon House is a heritage-listed retail building at 45–47 Argyle Street in the inner-city Sydney suburb of The Rocks in the City of Sydney local government area of New South Wales, Australia. It was designed by Michael Gannon and built from 1839 to 1840 by Michael Gannon as residential houses and stables. It is also known as Michael Gannon's House. As of 2019, it contains a Gannon House Gallery (an art gallery) and La Renaissance Patisserie (a cafe). The property is owned by Property NSW, an agency of the Government of New South Wales. It was added to the New South Wales State Heritage Register on 10 May 2002.

History The site had initially been part of the Hospital grounds, as part of the Assistant Surgeons residence and garden. When the hospital moved to Macquarie Street, Francis Greenway occupied the site as part of his salary as colonial architect under Governor Macquarie. When he was dismissed in 1822, he claimed that the residence and land had been promised to him by Macquarie. It appears even though the Government tried to repossess the site Greenway, remained there until . The subject site lays just to the east of the residence.

Land title documents indicate that an allotment of land bounded by Argyle and Harrington Streets, Harrington Lane and Greenway's residence was leased by Governor Brisbane in 1823 to John Gleeson, a labourer for a period of twenty-one years. By 1826 the lease was apparently conveyed to Thomas Ryan; however, no transfer record has been located.

In 1830 William Reynolds apparently purchased part of the land from Ryan for £100, and in the same year, the subdivided land on the corner of Argyle and Harrington Streets was sold by Ryan to Frederick Wright Unwin. Unwin leased part of the site and building that occupied it, a stone tenement and boarding house, to Caleb Slater, who conducted a public house called the Kings Head. When City Section 84 was drawn up in 1834, most of the land between Harrington and George Streets on the southern side of Argyle Street was claimed by Francis Greenway.

Greenway was unable to prove his title to the land, and it was sold to Unwin for by the Colonial government. By 1840, only a few years after the sale, hotels stood on both the Harrington and George Street corners of the block. In 1839 he leased about two-thirds of his allotment to Michael Gannon for 21 years for a ground rent of per year. The lease required that Gannon build and erect on the line of frontage to George Street within two years as many houses that could occupy the frontage, three storeys exclusive of cellars and built of "substantially of good materials".

Per the lease, Gannon built on the Argyle Street part of the allotment very quickly, and he had constructed the New York Hotel on the corner of Argyle and George Streets, which opened in February 1841. Gannon built the two houses on the subject site in Argyle Street from 1839-1840. Gannon's workshops (builder, manufacturer of coffins) and timber yard occupied the premises' rear, as did several other tenants.

Gannon was bankrupted in the 1840s depression, and his estate seized in 1845; besides personal possessions, everything including household furniture was sold to pay off his creditors at auction. The family left the Argyle Street property in late 1845 and settled permanently on the Cooks River.

J. S. Hanson appears to have the leasehold on the two houses until 1860, when the original 21-year lease expired. The 1858 Trig survey shows that little had changed on the site since Gannon left the properties. The buildings were utilised for both residential and commercial use. In 1858 No. 45 was a boarding house, and No. 47 housed a bootmaker.

The 1865 Trig survey indicates that the workshops and stables constructed by Gannon had been demolished, the residence expanded with the construction of a rear wing and outbuilding, and several sheds are attached to the eastern wall. The shingle roof had been replaced with corrugated iron by this time.

William Yeoman purchased the buildings in July 1870 and occupied part of the site with his business. In July 1885, John Gill, a pastoralist from Moonbi, purchased the buildings and land. He had it surveyed and measured to ensure the description on the deeds was accurate. Gill died in 1889, but the properties remained with his trustees until the site was resumed after the plague broke out in 1900. The Crown formally acquired the site in 1903. The Government administered the Rocks area from that time, beginning with the Sydney Harbour Trust, then the Maritime Services Board.

45–47 Argyle Street are typical of the smaller, less pretentious, but still ambitious development taking place in Sydney and The Rocks of the 1840s. Comparison with like buildings of the period is getting more difficult as they have become rarer, but "lesser quality" residential buildings such as Susannah Place (1844) and more substantial houses of Argyle Place put Nos. 45-47 in context.

The building's location and changing uses in The Rocks provide further evidence of the historical development of the area, across the Nineteenth and Twentieth Centuries, in terms of its changing fabric, and the changes in its function as firstly the centre, and later an adjunct, of the City of Sydney itself. Its survival retains the presence of the earliest consolidation of the area, its later more intense development in the mid-nineteenth century, through government acquisition for "slum management" in 1903. The buildings have the great ability to reveal information about themselves and their construction, and archaeologically important in this regard.Moore, 1992

The site's archaeological history is that it was part of the Hospital garden between 1795 and 1816.See also: AR038-039; AR045; AR057; AR061-070; AR073-074; AR078-079; AR084-085; AR126; AR129; AR131-132; AR149 Francis Greenway was in occupation of the site from 1815.AR057; AR062; AR078 The site was granted to Frederick Wright Unwin on 15 December 1838.AM064; AM119-120; AM161; AR062; AR078

Description The buildings comprise a two-storey structure, comprising a wide U-shape with the base towards Argyle Street, and are effectively one structure and form, identified as such by the shopfront of No. 47 and the windows either side of the centrally placed doorway of No. 45. This integrated construction is consistent with a low-cost development of the property. A low parapet with box gutter behind conceals the main hipped roof parallel to the street, which returns over the rear of No. 45, while that of No. 47 is covered by skillion roofs The rear wings enclose a courtyard. The ground floor is of stone and the first floor of brick construction with stud internal walls with lathe and plaster linings, all of which suggest a cost-conscious approach. While No. 45 is extremely intact both externally and internally in form and layout, the fabric detail of No. 47 is consistent with a major reconstruction of the rear wing in the late 19th century. Though adaptation of service rooms on each floor has taken place, the majority of rooms remain in their original format, with much of their original detail fabric quite intact, if covered by layers of subsequent paint decoration. The combination and juxtaposition of materials and their use is of great interest in understanding buildings of this type.

Style: Colonial Georgian; Storeys: No. 45two floors with seven rooms; No. 47two floors with three rooms; Internal walls: Lathe and plaster linings; Roof cladding: Galvanised iron and galvanised steel sheet, fixed over extensive remnants of the original timber shingle roof; Internal structure: Timber-frame; Floor frame: Ground floor stone – first floor brick construction; Roof frame: Shingled.

Archaeology notes: . Two-storey buildings. Vestiges of another building along western wall of courtyard; Built by: s.

Condition

As at 27 April 2001, the archaeological condition was assessed as partly disturbed. Assessment basis: Cellar under part of No. 45. Rear courtyard terraced into slope. Archaeology partly disturbed, however potential resources remain in rear yards and underfloor deposits. The archaeological resource on the footpath to Argyle Street disturbed to below footpath surface. An archaeological monitoring program was completed in November 2007.

Modifications and dates A trigonometrical survey of 1858 showed the buildings in similar configuration though walls of the outbuildings differed from the 1844 plan. A small addition had been made at the south-east corner of Gannon's own building (No. 45). By 1865, the workshop and stable built by Gannon has been removed, and additional outbuildings and rooms had been added at the rear of both buildings. According to a photograph, the main change appears to have been that the shingle roof had been replaced by a new roof of corrugated iron. Multiple-paned glass sashes were situated in all the window openings. The ground floor windows were protected by shutters.

Heritage listing As at 22 January 2009, Gannon House and Shop and site are of State heritage significance for their historical, aesthetic and scientific cultural values. The site and building are also of State heritage significance for their associations with the early development of the precinct and contribution to The Rocks area and local personalities such as Greenway, Unwin and Gannon.

The buildings provide important evidence of the architecture, building practices and economy of the late 1830s and 1840s. No. 45 in particular is significant as a largely intact and complete example of a residence from that period. Nos. 45–47 Argyle Street is a rare example of dwelling with attached "office/shop" which demonstrates the social and economic climate of the area at this time. The changes to the shopfront and rear of No. 47 represent the changing requirements and development of the commercial use of the building which is also reflective of the changes in the precinct and local area.

Gannon House and Shop are prominent elements in the eastern section of Argyle Street primarily due to their modest scale and location surrounded by larger, more elaborately detailed buildings. They are the only survivors from the 1840s development on the south eastern section of Argyle Street and make a positive contribution to varied character and historical nature of the precinct.

Gannon House & Shop was listed on the New South Wales State Heritage Register on 10 May 2002 having satisfied the following criteria.

The place is important in demonstrating the course, or pattern, of cultural or natural history in New South Wales.

The site is historically significant as part of the first hospital and site of the surgeon's residence and garden. From 1816, on relocation of the hospital to Macquarie Street, it became part of a contested and sought after address and valuable piece of real estate in what was fast becoming the commercial heart of Sydney.

The site was a part of a larger land holding developed by F. W. Unwin by lease arrangement with local builder Michael Gannon form 1839, who as attracted to the site's prime location, close to the centre of mercantile and shipping activities.

The buildings were constructed as a dwelling with workshops and stables at the rear and attached "dwelling or office" in recognition of this prominent address, growth and development of the area and also demonstrated the building practices of the time and economy of the situation. Gannon constructed a number of "speculative" buildings on the land in the same sound, simple and contemporary style.

The buildings continued to be used for both residential and commercial purposes will into the 20th century and are historically significant as they demonstrate local life from the time of their construction and later evolution of the local area and shift from mixed use to solely commercial use, by the adaptation of both Nos. 45 and 46 and additions to the rear of No. 47.