The walls of the house are made of horizontal drop slab cut from local timbers including stringybark from the top of the mountain. Tuck, who was employed by the McCraes and assisted by the older boys of the family, used wattle and daub, bark, messmate shingles and sods as well as slabs and squared logs.. Georgiana designed the house and each detail such as the Count Rumford fireplace. The three thousand bricks necessary to build it were sent down the Bay from Williamstown to Arthurs Seat on the Jemima, a small sailing boat. The house is small but well thought out with a separate kitchen as was common at that time to prevent fires. A floorplan drawn up by Georgiana in 1850 exactly reflects the present layout of the homestead with a small addition being done on the side of the house in the 20th century.