Demasson's House and Shop is situated on Stirling Terrace in Toodyay, Western Australia. It was constructed in two stages. The shop was built around 1872 for Daniel Connor. By 1875 William Amed Demasson, a carpenter wheelwright from Guildford, Western Australia, had added a dwelling with a connecting door to the store, which was at the time run by his wife. In 1886 Demasson purchased the store from Connor. Land titles show the Toodyay Road Board purchased the dwelling from Amy Twine in 1945. When the doctor's residence and surgery in Lincoln Street were demolished for the standard gauge railway in 1963, this dwelling was rented to Dr. P. O'Reilly and the shop became his surgery. Mrs O'Reilly was given life-time occupancy of the dwelling after her husband died in 1977; she remained there un