Sir Robert built a two-storey range of buildings to the east of the keep, enlarging the accommodation with a long hall and a solar.

King James IV visited Balgonie on 20 August 1496, and gave 18 shillings to the masons as a gift.

[2] In 1627 the castle was sold to the Boswells, who sold it on in 1635 to Sir Alexander Leslie, a Scottish soldier who had fought for the Swedish army during the Thirty Years' War (1618-1648), rising to the rank of Field Marshal, and who led the Covenanters during the Scottish Bishops Wars.

He carried out further improvement of his home, adding a two-storey building at the south-east corner of the courtyard.

He also rebuilt the late 15th century north range with an extra storey, and laid out a park around the castle, remnants of which remain.

Lord Rothes, with the aid of John Mylne junior, the king's master mason, built a grand stair linking the keep and north range, where previously a wooden bridge stood.

David Melville, 6th Earl of Leven made minor improvements in the 1720s, including the insertion of sash windows.

He was unable to arrest the decay which was advancing, and in the mid nineteenth century the roofs were removed to avoid paying tax on the property.

The keep and chapel have now been fully restored, and the castle is once again occupied; its current owner is Raymond Morris, originally of Walsall, and his family.

The castle is open to the public, and the restored chapel and great hall can be hired for events such as weddings.