He was born 17 December 1708, the eldest son of Charles Hyett (d. 1738), a leading citizen of Gloucester.
[3] Shortly after[5] he married Frances (d. 1768), the only child of Sir Thomas Snell, a London merchant who had settled in Upton St Leonards.
[3] By 1740 Hyett had created a Rococo garden at Marybone House, Gloucester, incorporating an eclectic range of features and buildings including a pagoda in approximately 6 acres.
[8][9] A few years later he created a slightly larger garden at his Painswick house, known then as Buenos Aires.
[11] Visual records of both gardens when newly created were preserved in paintings by Thomas Robins the Elder.