In about 1830, John Crichton-Stuart, 2nd Marquess of Bute, grandson of the 3rd Earl, transformed the house, to the designs of the architect Robert Smirke (later Sir Robert, 1781–1867), a leading architect of the era. Smirke redesigned the house (with the exception of the south front) to resemble its present form today, complete with a massive portico, similar to that designed by Adam but never built. His early work and domestic designs, such as that at Eastnor Castle, were often in a medieval style; he seems to have reserved his Greek revival style for public buildings such as the British Museum. Luton Hoo, neither gothic nor strictly Greek revival, is an unusual example of him using a classical style for domestic use, which perhaps he felt would be sympathetic to Adam's original conception.