Lambeia is a mountainous steep settlement, located in central Peloponnesus. It is a place that is open to nature, a rural community. The architectural proposal attempted the integration of the local character, focusing on the generic qualities and the social conditions of the place, as well as the structural identities and formations of the anonymous traditional architecture. The basis of the design proposal is the conjunction of the “informal” with the sense of familiarity for the inhabitants of the village. In this context, the spaces were considered as open flexible spaces, programmatically and structurally, -spaces for public discourse, able to be appropriated by diverse people. The need for multi-functionality, flexibility (of spaces) outlined the design from the internal spaces to the outdoors’ of the building, presenting undefined boundaries, with the intention of a minimum impact on the natural bas-relief and the continuation of the landscape. Current aspects with regards to sustainable architecture and the practices of passive design turned our interest to the study of the microclimate environment. A flexible (semi-open) southern greenhouse structure defines the climate of the interior space. Local materials and techniques, which were already available to the community, are inserted in our spatial design tactics (the remake of usual construction methods).