 His son and heir, John Lennox Kincaid Lennox, had Hamilton design and build Lennox Castle on the ancient Lennox of Woodhead estate in the Parish of Campsie; about a mile and half west of Lennoxtown, between 1837 and 1841.The family moved there and Kincaid House was sold in 1921.It was eventually converted into a hotel and remains in use as such today.