The Kellybrook Winery property has local significance for the remaining old oak tree, which is thought to be associated with the 1890s homestead of William Martin, gardener and orchardist.
The present Kellybrook Winery and Restaurant have significance for their associations with the Kelly family between the 1960s and 1990s. The vineyard landscape, with its rare Cider Apple orchard, is an unusual and beautiful local feature. (Criterion A4, D2, E1, H1)
KELLYBROOK WINERY AND OAK TREE - Physical Description 1
The Kellybrook Winery occupies a small valley, the slopes on all sides being covered with grapevines. The cider apple orchard was planted more than 30 years ago, and is located close to the house and winery. Stock for the orchard was brought from England. It is thought to be the only commercial cider apple orchard in Australia.
The restaurant was the original winery building built after the 1962 bushfires. Box Hill Electricity Supply provided power poles which were used to construct this building which replaced an early building. The building was built as a machinery and hay shed. 
Within the garden at the Winery is a large spreading oak (species not identified) which is believed to be located on/close to the former homestead site occupied by William Martin. It is thought to be over 100 years old.