The land on which Upton House stands was acquired by William Spurrier, four times Mayor of Poole. The house itself was built by his son, Christopher, between 1816 and 1818 and its west wing was added in 1825.
The Spurriers had built their wealth on the Newfoundland trade, but this went into decline and this, coupled with Christopher Spurrier's gambling and extravagance, force him to sell the property in 1828 to Sir Edward Doughty, a member of the Tichborne family. Upton House remained with the barons of Tichborne until 1901 when, as a result of massive debts, they sold it on to the Llewellins who held it until 1957, when William Llewellin bequeathed the estate to Poole Corporation (now the Borough of Poole). The borough looked at various options to fund its upkeep including plans for a zoo, hospital or golf course. For several years it was rented to Prince Carol of Romania. In 1976 it was decided that, based on public opinion, the estate would be opened that year as a country park and leisure facility for the people of Poole. Following restoration, the house was also opened to the public in 1981.
In 2015, Upton Country Park became part of the newly established Holes Bay Nature Park.
