Water is as valuable on Waiheke as it is in Andalusia. The droughtprone island depends for its supply on water tanks and bores. The Owhanake Bay House is no exception, but water is also integral to a design strategy that seeks a harmonious relationship between the house and its environment. “The idea is to pull the regenerating landscape back into the house,” Strachan says. The house’s effluent system enables this plan to be realised, and it also allows the inhabitants to grow their own vegetables on a formerly barren site.