[1] After the deaths of his parents, he inherited Guy's Cliffe Estate in Warwick, which had been bought by his father, and the Caribbean plantation on St Kitts near the capital, Basseterre, which had been established by his grandfather, John Greatheed.
[5] He owned building plots on either side of what is now the Parade in Leamington,[2] and was a partner in the Royal Pump Rooms, which was located on five acres of his land.
[2] Correspondence between Greatheed and his St Kitts plantation managers is now archived at Warwickshire County Record Office, and includes information about the trade of enslaved people, production of sugar and rum and the profits of the estate.
[6] Bertie Greatheed supported the abolition of slavery,[4] and described the plantation as his "odious property",[7] however he continued to own enslaved people.
In 1835, his descendants, including Lord Charles Greatheed Bertie Percy, the husband of his granddaughter, received £1,223 6s 7d in compensation after the Slavery Abolition Act 1833.
A blank verse tragedy by Greatheed, The Regent was brought out at Drury Lane Theatre on 1 April 1788, supported by John Kemble and Sarah Siddons; it ran for nine nights.
A reviewer included "The plot is altogether interesting; but the scene in which the child is introduced is too horrid an outrage upon the feelings, and such as the state the English stage will not sanction.