The estate was sold in 1684 to Sir Thomas Steuart, when Bruce moved to his new home at Kinross House. In 1698 it changed hands again, becoming the property of Sir Robert Anstruther, whose son Philip undertook works in the mid-18th century, including heightening the central block. It was now that the wing walls and pavilions were added, according to John Gifford. Further alterations were made by William Burn in 1830-32, including a porch and new windows, and a stable block. In 1856-58 David Bryce, an Edinburgh architect, worked on Balcaskie, adding several baronial features.