Feudal barony of Dunster Fownes (c. 1722 – 1780), who under his father-in-law's will inherited the Luttrell estates including Dunster Castle, with the proviso that he should adopt the surname and arms of Luttrell. Henry Fownes (c. 1722 – 1780), who married the heiress Margaret Luttrell (1726–1766) and under his father-in-law's will inherited the Luttrell estates including Dunster Castle, with the proviso that he should adopt the surname and arms of Luttrell. He was High Sheriff of Somerset from 1754 to 1755, and a Member of Parliament for Minehead from 1768 to 1774. The couple modernised the Castle, in the Georgian style, which included
Dunster Castle Conygar Tower, was constructed by architect Richard Phelps to improve the view from the castle, and a larger park of 141 hectares (348 acres) was built just to the south of the castle, requiring the eviction of a number of tenant farmers. Henry's son, John, inherited the castle in 1780, but when his son, also called John, inherited in 1816 he chose to live in London instead, opening up Dunster Castle to the public. By 1845 the castle appeared to visitors to be past its prime: with only two of John's sisters living there and no horses or hunting dogs