He inherited from his father the house at Castle Coole in County Fermanagh, along with considerable debts. Nonetheless he furnished the house and its classical interiors designed by James Wyatt in an exuberant Regency fashion between 1802 and 1825. Elaborate curtains and pelmets, pier glasses, "Grecian" couches and a magnificent state bed designed to accommodate King George IV on his state visit to Ireland in 1821 (although the king did not make it as far as Castle Coole, much to the disappointment of the earl) were all supplied by the Dublin upholsterer John Preston at a total cost of around £35,000. Lord Belmore also commissioned Sir Richard Morrison to build a new stable block in 1817.