A private auto-workshop for buggies and rally cars. The building iis to located on a plot of 2.5 ha, on the teritory of a private residence. total area is 446 sq. m. A decision was made to cover the building with earth to visually protect the residence from its semi-industrial function. The main function of the building is sports vehicle repair and maintenance. It includes a large main room with two wide gates on opposite sides, Office and conference room, changing rooms and showers for personel, large storage area and technical rooms. The main workshop encorporates 2 repair spots withcar lifts and 2 display parking places. 2 alternative daylight solutions were proposed in it, one with velux light condouits and second with a large square skylight at the top of the hill. The office is lit with a large skylight in the side of the hill.  All walls and slabs are made from cast-in-place concrete.