Perth House is a heritage-listed former residence and school for girls at 85 George Street, Parramatta, Sydney, New South Wales, Australia.

[1] Perth House, stables and carriageway were built in 1841 by James Houison for George Oakes, a landholder of the Parramatta district and member of the Parliament of New South Wales.

The original cottage garden around the house, stables and carriage way was likely to have been planted between 1844 and 1846, including the Moreton Bay fig (Ficus macrophylla) which survives today.

Archaeological Site: AZP Cross Reference: PC 71[1] To the west of the house and north of the stables near the footpath on George Street is a large mature Moreton Bay fig (Ficus macrophylla), thought to date from c. 1844-6, in the time of Oakes.

[6][1] Perth House and Stables was listed on the New South Wales State Heritage Register on 2 April 1999 having satisfied the following criteria.

Division into flats and offices in the 20th century reflected the increasing commercialisation of central Parramatta, with key residential areas on its fringe.

Perth House was apparently built for pastoralist George Oakes, son of a former missionary, who became first Member of the Legislative Assembly for Parramatta as well as a lengthy involvement in local municipal politics.

Perth House is also associated with James Houison, who arrived in the colony as a steerage passenger, quickly established himself as an astute builder and urban land speculator and later became known as an architect/builder of recognised talent as well as an important figure in municipal politics.