Energy sustainability of new service buildings should considers the use of envelope materials able to minimize thermal dispersions avoiding at the same time environmental and landscaping impacts specially in the small islands of Mediterranean sea generally characterized by high environmental and landscaping values. In this context, the paper provides an analysis of local materials for the design of low-energy service buildings in touristic islands, according with the concept of re-use. As a preliminary result, a case study in Favignana Islands is presented designing a modular and temporary structure using local materials and municipal solid waste. The pilot project includes a summer and a winter design, and can be replicated in similar contexts.