The immediate site of what is now known as Rumwell Hall comprises two former properties anciently known as Homelands and Dodhouse. These lay in the tithing of Rumwell and Hundred of Hull within the manor of Taunton Deane. Formerly held by Solomon Andrewes, they passed to John Colborne and in 1670, following Colborne's death, to his widow Grace, being known subsequently as Colborne's.
Grace Colborne in 1671 sold the premises to John Cross, gent., of Trull who in 1701 settled them on his daughter Joan and her new husband Peter Sidon from Exeter. The Risdons bought further land in the area and Joan succeeded her husband in 1713, assigning the premises to her son, Benjamin Crosse Risdon of Trull in 1724 adding other lands in 1731.
It seems likely that in 1733 Benjamin built or rebuilt a substantial house on the site, in which year he mortgaged the estate to Sir Edward Seymour, Baronet, and eventually Risdon owed £1,500 on the property.
Sir Edward Seymour (died 1740) lived chiefly at Maiden Bradley in Wiltshire, but also owned Berry Pomeroy Castle in Devon, and it is possible that the Rumwell holding represented a convenient stopping-off point between his two estates. At all events, the mortgage being undischarged, Sir Edward seems to have taken possession in 1739 shortly before his death. The Seymours continued as occupiers until 1786, Sir Edward's son succeeding his distant cousin as Duke of Somerset in 1750 and, on his own death in 1757, being followed by his son, also Edward. It is probably from this tenure that the story of Rumwell having been built for the Duke of Wellington stems.
Benjamin Crosse Risdon left a son, Benjamin, and three daughters who eventually took the settlement of the estate to Chancery, although the final disposition of the Risdon property did not take place until 1792, largely owing to the deaths of successive heirs. Benjamin Risdon evidently occupied the main house, while part of the estate was leased to his brother-in-law, Thomas Govier. The premises were sold in 1796 to John Cape of Wellington, although Risdon continued to occupy them until 1803-4.
