The estate portfolio includes several premium vineyards across the Margaret River region. Their philosophy is to craft fruit driven, elegant wines which are a true reflection of the vineyards whence they come, with an uncompromising commitment to quality. Many of the Calneggia wines are produced from premium wine grapes sourced off the Clearwater Estate vineyard owned by the Calneggia family. Further harvests are sourced from the vineyards of Westralian Nominees, of which the Calneggia family are substantial shareholders. These vineyards totalling some 160 hectares are all located in the northern part of the Margaret River wine region, where warm days and cool nights during the ripening season provide perfect growing conditions. The deep red loam and gravelly soils impart a richness and depth of flavour to the wines and the abundant water supply and proximity to the coast provide perfect growing conditions.

Producers of the Rosabrook and Bunkers, Brian Fletcher, Calneggia and Bramble Lane labels, Rosabrook were one of the first wine producing pioneers of the Margaret River region. The Rosabrook Estate Vineyard is located near the hamlet of Rosa Brook some 14 kilometres east of Margaret River Township. The soils here are the highly favoured Forest Grove, sandy topsoils with a high gravel content overlying a clay subsoil. This soil is very free draining but does hold a reasonable amount of moisture which provides for balanced and even ripening. The vines are over 25 years old and produce intensely flavoured fruit. Bunkers Wines is named after spectacular Bunker Bay, the pristine beauty on the tip of the Cape Naturaliste peninsula in the Margaret River wine region in Western Australia.