On the sand dunes with uninterrupted ocean views, sites don’t come better than this for an Australian beach house. The 1980s house was structurally sound but poorly planned to take advantage of the site, so the decision was made to replace it. The brief for the new house was to accommodate extended family members staying at the same time or separately, meaning flexible accommodation and the ability to open up or close down separate areas. The design comprises two parallel pavilions. The larger pavilion has the living/dining/kitchen space and two bedrooms upstairs, with additional bedrooms and a large store for outdoor equipment below. The shorter northern pavilion is a generous open living space upstairs with bifold doors up both ends, stepping out onto decks with ocean views in the east and mountain views in the west, and a massive fireplace. Below this is a large playroom come bunk room, with large doors to the sheltered garden. The building was designed on passive solar principles and for good natural ventilation to minimise heating/cooling demand.