The house known as Glengallan, 77-207 Greigs Road East, Mt. Cottrell, is significant as a predominantly intact example of a Late Victorian style, with rear interwar additions that further contribute to an understanding of the historical evolution of the place. The main front part of the house was most likely built c.1917. It is also significant for its representation of the Exford Closer Settlement Estate, and the historic break-up of Melton's pastoral estates in the early twentieth century.
The house known as Glengallan, 77-207 Greigs Road East, Mt. Cottrell, is architecturally significant at a LOCAL level (AHC D.2, E.1). It demonstrates original design qualities of a Late Victorian style. These qualities include the hipped roof form, together with the encircling bullnosed verandah. Other intact or appropriate qualities include the single storey height, symmetrical composition, horizontal timber weatherboard wall cladding, front timber wall cladding simulating ashlar blockwork, corrugated profile sheet metal roof cladding, face brick chimneys with rendered tops having projecting cement coursing and cornices, turned timber verandah posts, front timber framed doorway with sidelight and highlight - and flanking timber framed tripartite double hung windows, other timber framed double hung windows, and the narrow eaves. At the rear, the gable addition representing changes during the interwar period also contributes to the significance of the dwelling. The intact design qualities of this portion of the dwelling include the single storey height, gable roof form clad in corrugated sheet metal, horizontal timber weatherboard wall cladding, two face brick chimneys with soldier course tops, and the decorative gable infill (stuccoed panelling and vertical timber battening).
The house known as Glengallan, 77-207 Greigs Road East, Mt. Cottrell, is historically significant at a LOCAL level (AHC A.4). It is one of few remaining Melton Shire houses built as a result of the Closer Settlement Board's subdivision of prominent pastoralist HW Staughton's Exford Estate, one of the earliest, largest and best-known of the estates created under the Closer Settlement Act 1904. It expresses one of the major themes of Australia's history - the contest between large pastoralists and small farmers for the land - and the abiding power of the yeomanry ideal well into the twentieth century. The break-up pastoral estates was a major event in Australia's history, and the break-up of the huge area of land represented by the Rockbank, Exford, Overnewton and Melton Park estates represented a major turning point in the history of the Melton Shire. The farm was a model for pasture improvement and cropping in the region, and a regular venue of farmers field days.
Overall, the house known as Glengallan, 77-207 Greigs Road East, Mt. Cottrell, is of LOCAL significance.