The present dissertation entitled "Sustainable design for eco-tourism accommodation in Sklithros based on the principles of the circular economy" aims to investigate the design of an ecotourism lodge, based on the principles of the Circular Economy, as a center of hospitality, rest and the facilitation of “green” activities and a hub of experiential learning and sustainable development with respect for the environment. The community department of Sklithros Larissa includes the settlement of Rakopotamos next to the Aegean and the homonymous settlement located in the Natura area, in the forest, on the east side of Mavrovouni. The  individual objectives for achieving the purpose are the investigation and determination of the architectural  form of the project, is the number, type and location of the buildings that constitute the lodge, the research  of the circular economy practices for the construction and operation of the lodge and its practices and the  assessment of their viability, and its two-dimensional and three-dimensional representation.

 Included in the dissertation: the description of the plot, the settlement, the area, and the review of the environmental, economic, and social information related to the implementation of the purpose. For the implementation of the objectives, draft models and initial 2d geometries of the desired typical architectural forms of buildings as ecotourism accommodations were constructed and placed successively in alternative positions and combinations in sloping topography. Among the alternative design forms, the architectural ensemble that best meets the basic building criteria of coverage, construction, orientation, view and ease of access was chosen. A bibliographic review was conducted on the architecture, construction and operation of tourist accommodations based on the business model of the circular economy. Construction and operational options were researched and evaluated based on the circular economy model in terms of their viability for this specific project. The proposed design of the selected architectural ensemble was designed in 2 and 3 dimensions in relation to its location on the plot.