LiderA is the Portuguese acronym of Lead for the environment in search of sustainability construction, and is the designation of a Portuguese voluntary system which aims an efficient and integrated support, of the evaluation and certification process of the built environments that seek sustainability. Through its principles and criteria, LiderA allows the support of development projects that seek to ensure sustainability and the demand for product sustainability in built environments like buildings, urban areas and sustainable tourism destination. The system have been use and certify a larger number projects and areas including more than 1200 flats, 6000 touristic beds, more that 2 millions of m2 of comercial and services area in Portugal and other countries.