Dunster Castle front and square towers, set within the older castle walls and overlooked by the keep above. The building was decorated in the latest styles, including ornamental plaster ceilings. The project ran almost three times over budget, costing Luttrell more than £1,200. In the 1640s the English Civil War broke out between the supporters of King Charles I and Parliament. Thomas Luttrell, George's eldest son, initially supported Parliament and after the outbreak of war William Russell, the Duke of Bedford and Parliamentary commander in Devon and Somerset, ordered him to increase the garrison at Dunster to resist a potential Royalist attack.
Feudal barony of Dunster Milton Abbey, Dorset, and the couple made many extravagant alterations to the Castle, including the addition of the carved wooden staircase and a new dining-room with elaborate plasterwork ceilings. An inventory dated 1690 survives, which lists the sumptuous fittings and furnishings at that date. By his wife Mary Tregonwell he had two daughters, Mary and Frances, and a son and heir Tregonwell Luttrell (1683–1703), of Dunster Castle, who died without children. Tregonwell Luttrell (1683–1703), son, who died without children. Col. Alexander Luttrell (1663–1711), uncle, youngest son of Francis Luttrell (1628–1666) of Dunster Castle. He matriculated at Christ Church, Oxford in