The increasing cost of traditional energy sources and the availability of new emerging building technologies in lighting, heating, ventilation, air conditioning, isolation, energy monitoring and management of the buildings, are expected to increase the global market for low carbon solutions. However, some financial, organizational and social innovation enablers are required to leverage the transformation towards more sustainable building and cities. New green performance based business models should clearly be introduced for stepping up the adoption of new energy efficient solutions through the creation of cooperative and collaborative business networks, which will allow an early involvement of all relevant value chain stakeholders in the retrofitting optimization process, such as construction SMEs, ESCOs, building owners (private and local authorities), local administrations or financial institutions.Overall aim:• NewBEE project will develop the NewBEE system enabling SMEs to generate New performance based Business models for cost and Energy Efficient construction works with special incidence in retrofitting.• NewBEE system will be composed of:o NewBEE methodology: Methodology and working handbooko NewBEE ICT platform: Set of ICT toolsInnovation:The main innovation of NewBB comes from the seamless integration from the first time, of all actors in the value chain of energy efficiency in construction industry (paying special attention to the retrofitting works where most of the savings in energy efficiency can be achieved) by the use of a new working methodology fitted to the new paradigm efficiently supported by an ICT set of tools.Another important innovative issue is the creation of a system which benefit from the previous knowledge in order to enabling SMEs to find an easy way of generating new business opportunities and also provide them the means to develop them.