The efficiency search in construction processes, with the aim of reducing the impact of construction on the natural environment, leads to minimizing construction actions on the ground. Vernacular Greenhouse (Greenhouse Prototype) is essentially prefabricated, its processes are assembly, not construction. Being a roof house, and being this element that is prefabricated, the amount of waste and the impact on the land tends to be less than almost 80%. The interior walls of elementary construction, dry, are adaptable to any material. The passive bioclimatic strategies, heat the house by the effect of terraced greenhouse, avoiding radiant barriers, insulating by thermal inertia, and conserving heat by compartmentalization and materiality.