Lucas states that its architectural value is derived from the quality of original detail which has survived, its architecture being of national significance. Willandra retains a special association for the Ryde District Historical Society, who have been tenants of the property, along with the Ryde District Art Society, since its opening following the completion of the conservation works in 1980. Willandra was listed on the New South Wales State Heritage Register on 2 April 1999 having satisfied the following criteria. The place is important in demonstrating the course, or pattern, of cultural or natural history in New South Wales. Willanda is historically significance for its central role in the attempt to establish a gentry hegemony in the locality during the 1840s following the end of convictism in NSW, for its associations with attempts to transplantthe customas of the English manor to the colony, for its role in the creation of the Village of Ryde, for reinforcing the locality name of Ryde, for its longassociations with persons such as James Devlin and John Edye Manning and for its identification as an element of the nation's architectural heritage in the 1970s. The place is important in demonstrating aesthetic characteristics and/or a high degree of creative or technical achievement in New South Wales. Willandra is aesthetically significant as a historic landmark, located in a visually dominant position on the ridge at Ryde, with commanding views of the Parramatta River. The building is a fine and locally rare example of a colonial Regency style manor with quality detailing. With its elevated, corner siting and former grandeur, Willandra has strong visual appeal. The strong, symmetrical form is a reminder of the intended stability and control intended by the Ryde gentry over the rural workers. The place has a strong or special association with a particular community or cultural group in New South Wales for social, cultural or spiritual reasons. Willandra is identified as an important item and resided in by community groups. Willandra is held in high esteem by the Ryde Historical Society who are based in the building. It is valued by the Ryde Arts Society for providing a suitable atmospeher for holding art classes and displaying art works. The building is also viewed by members of the community for its unique role in the development of Ryde, for its aesthetic character and its commanding, identifiable setting. The place has potential to yield information