This paper addresses an integrated building concept that operates on energy-efficient basis while capturing retrofit opportunities that scale from a single building to multiple buildings at district level. The proposed concept is developed based on two research areas; (1) Building energy supply-side (microgrid) management and (2) Building energy demand-side management complementing with the integrated energy production from renewable energy sources, building energy diagnostics and predictive control, ubiquitous wireless sensing technologies, and microgrid power electronics and power control to exploit the potential for reduction of building energy consumption, thus addressing the deficit of insufficient tool support. To reach this objective, new methods and tools are researched that increase system productivity covering hardware and software design for individual production/consumption sub-systems, system design of component networks and integration into backend systems. The research focuses on an innovative model-driven development approach that integrates systems in building supply-side and building demand-side to provide optimized energy production/consumption. The system integration is based on advanced control algorithms capable of learning from previous operations in real time. The research findings will be demonstrated in an appropriately selected building in Istanbul, integrating different energy efficient production/consumption systems addressing the renewable energy technologies (wind and solar power), energy storage systems and building energy management systems comprising scalable and robust sensing network platforms, energy performance monitoring and data mining technologies.