 The Whitley Group is significant within the local area and region as a substantial and picturesquely located property, representative of the important group of large country residences built in the 1880s and 90s by prominent Sydney families which established the social character of the Bowral-Moss Vale-Sutton Forest area and contributed to the development of the area as a place for rural retreats.The property as a whole with its mature tree plantings and hedges is also significant because of its aesthetic qualities which contribute to the character of the distinctive rural landscape of the Mt Gingenbullen slopes.Whitley was listed on the New South Wales State Heritage Register on 2 April 1999.