Denistone is located 16 kilometers North West of the Sydney central business district, this northern suburb is in the local government area of the City of Ryde. Denistone East and Denistone West are separate suburbs. Denistone has been named after the name of a home built in the area called Denistone.
An aboriginal tribe the Wallumedegal lived in the area between the Lane Cove and Parramatta Rivers, which was known as Walumetta. A free settler Gregory Blaxland purchased the 450 acre Brush Farm estate in 1806 shortly after his arrival in the colony. In 1829 he transferred Brush Farm estate to his eldest daughter Elizabeth and her husband Dr Thomas Forster. Denistone was named after Forster’s home, it burnt down in 1855. Richard Rouse Terry acquired the land in 1872 where he rebuilt Denistone House it now stands within the grounds of Ryde Hospital. The Hermitage is another historic house built in 1842 by Gregory Blaxland’s son John.