1. RELATIONSHIP WITH THE SURROUNDINGSThe plot is shaped like the trunk of a long pyramid in plan, it is almost flan and it measures 2 ha. It is divided in two parts, one, on the north side, covered by a vineyard, and the other, on the lower south side, where there are both deciduous (chestnuts, walnuts) and evergreen trees (pines and Holm oaks).The dwelling is placed in the centre of the plot, dividing it in two like a diaphragm. It is a pure concrete box opened in the middle, where the living is placed, by two large French doors (9 x 2,5 m) in both North and South faces which allow a complete transparency that visually connects the vineyard with the trees.2. SUSTAINABILITY– Green flat roof planted with low water consumption plants. – Insulated sliding shutters and awnings that open or close depending on weather conditions.– Crossed ventilation. Openings in the concrete allow for ventilation in both North-South and East- West directions.– Economic construction, the architect has been also the home builder, has sought at all time, simple construction and local solutions. The final price has been from 60.000€ 3. COMPOSITIONTwo interior elements, bathrooms, installations and kitchen, divide the house in a living room at the centre and two bedrooms, one on each end.The openings in the concrete volume form two visual axis shaped like a cross, one transversal across the living and another longitudinal that links the bedrooms.At the same time, the pool area, intersected with the volume of the house, enhances the continuity between the inside and the outside.