The central tower was built by 1836 and the house was virtually complete by 1844.
A letter from the Reverend Richard Cust (1785-1864) to his niece, Lady Sophia Tower (1811-1882) dated January 11th, 1849 gives evidence that Gregory Gregory had moved in to the Manor from nearby Hungerton Hall. He only used part of the house due to his health, probably the present Morning and Drawing Rooms.
“… Last Saturday I called on Mr Gregory at Harlaxton and was glad to find him at last comfortably established in his lower rooms instead of being 70 steps high, a place not suited to one so crippled with gout. I think you saw the rooms in preparation; his Den has very pretty Gobelin Tapestry and his small Drawing Room panels of blue satin with a cornice of blue, gold and silver; by stoves he has rendered this part of his house (including the Great Hall) very warm.”
According to the 1851 Census return, fourteen servants also live in the Manor, which by Victorian standards was a modest staff. This included a house keeper, a butler, four house maids, a kitchen maid, a stillroom maid, a scullery maid, two grooms and three footmen. A porter and house servant lived in the Lodge.
The Census shows that Gregory Gregory brought his butler, Samuel Baguley, and Richard Wade the Gardener, with him from Hungerton Hall. Apart from these two rest of the servants appear to be new.