Lionel Cranfield, Ist Earl of Middlesex, acquired Copped Hall from the daughter of Sir Thomas Heneage in 1623. Cranfield became the Lord High Treasurer of England but was disgraced and lived in retirement at Copped Hall until his death in 1645. While at Copped Hall he filled the house with treasures and extensively cultivated the garden.
Lionel Cranfield's two sons ( the 2nd and 3rd Earls of Middlesex) followed as owners of Copped Hall. The 3rd Earl was one of the six persons sent to the Hague to invite King Charles 11 to return home. The 2nd and 3rd Earls' sister, Francis, married Richard Sackville- 5th Earl of Dorset. Their son Charles ( 8th Earl of Dorset) inherited Copped Hall 1674. He sold the hall in1701 to Sir Thomas Webster and took the best of the contents to Knole, near Sevenoaks- where they can be seen to this day.
Sir Thomas Webster owned Copped Hall from 1701 to 1738 but spent most of his time at his main house in Sussex. It seems that Copped Hall became rather dilapidated during his ownership. The foundations started to give way in one part and a hurricane damaged other parts. In 1739 the estate was sold to Edward Conyers whose son, John, demolished the mansion in 1752.