After Capell's execution, his son Arthur Capell, 1st Earl of Essex, inherited his estates. Following the Restoration of the Monarchy, the younger Arthur Capell rose to become Lord Lieutenant of Ireland in the reign of Charles II. He moved the Capell family seat from Hadham to Cassiobury, commissioning a lavish reconstruction of his father's Tudor mansion from the architect Hugh May. The new house was built c.1677–80 and laid out on an "H" ground-plan, popular during that period, incorporating the original north-west wing. As he had already done at Windsor Castle, May teamed up with the wood carver of the day, Grinling Gibbons, and the painter Antonio Verrio to create a sumptuous interior. Capell was an ambitious courtier, and by fitting out his mansion with richly decorated state rooms in the style of Windsor, he hoped to attract a visit from the King to Cassiobury — he was not successful.