Surrounded by vineyards and olive trees, this housing development for three siblings and their families is situated on the urban periphery of Bullas in the province of Murcia. The climate in this sunny region is characterized by hot summers and cold winters. The architects developed a number of strategies to create an energy-efficient housing group that not only responds to climatic conditions, but that also reflects local building traditions. These measures included the use of solar panels on the south-facing roof areas, the installation of a biomass heating plant and a system for collecting rainwater for use in the gardens. Three independent dwelling units are grouped about a central, communal courtyard – not unlike a windmill in layout, which ensures adequate privacy between the houses. With individually designed floor plans that are nevertheless similar in form, the dwellings have as their focus a generous, L-shaped living-dining realm with an open kitchen. The loggia and the space over the sitting area are higher, and a rooflight ensures additional daylight and cross-ventilation. The parents’ bedrooms, with adjoining roof terraces, are situated on the upper-floor level and command broad views over the hilly landscape. Externally, the development presents a unified appearance, with an autoclave printed pine facade that will fade and turn grey in the course of time. The structure consists of hybrid elements selected according to various principles.