MIMOSA was built for local tannery owner and businessman, Andrew Thompson in the late 1800s.
Mimosa is a good example of a late Victorian suburban middle-class Italianate villa, and demonstrates the rise of living standards of the business class in the nineteenth century.
It is also one of a small number in St Marys built during the 19th and early 20th centuries that demonstrates the evolution of village settlement.
It was designed and built by local building contractor Joseph Sainsbury.
An 1894 report in the Nepean Times said Mimosa was considered to be "without a doubt, the costliest building in the Nepean district".
Mimosa is a rendered brick home, has an asymmetrical front and a two-storey verandah with cast iron columns, brackets and valance.
The external walls are decorated with rendered brickwork, corner masonry blocks, window sills, classical window pediments, and decorative glazed tiles.
The house is set within a garden enclosed by a substantial cement rendered dwarf wall with iron palisade fencing and a pair of grandiose gate posts.
*Source: Penrith Council.