In 1751, Sir Richard Sykes demolished the previous Manor House at Sledmere, which had existed since medieval times, and built a new mansion. He also planted some 20,000 trees on the Wolds about his new home. He left no male heir however and on his death the estate passed to his brother Mark Sykes (1711–1783). Sir Mark's son, Sir Christopher Sykes, 2nd Baronet (1749–1801), MP for Beverley, greatly expanded the estate. He and his wife bought and enclosed huge areas of land for cultivation, built two new wings to the house, and landscaped the grounds, planting of trees. The entire village of Sledmere was moved. Sir Christopher left a vast estate of nearly and a large mansion set in its own of parkland, which survives in the family to the present day. Sir Christopher also employed Joseph Rose, the most celebrated plasterer of his day, to decorate Sledmere. The result has been called among the finest plaster-work in England.