The Centre for Efficient and Renewable Energy in Buildings (CEREB) is a unique teaching, research and demonstration resource for the built environment hosting a number of renewable and intelligent energy solutions. CEREB has been developed in partnership between London South Bank, City and Kingston Universities with funding from the Higher Education Funding Council for England (HEFCE), London Development Agency (LDA) and M and E Sustainability. Located at roof level of the new London South Bank University teaching facility K2, the Centre houses evacuated solar tubes for domestic hot water, Photovoltaics (PV) providing electricity and ground source heat pumps providing heating for the entire building, and, through reverse cycle operation, provide cooling in the summer. The data from the monitoring systems is available via a web interface that allows it to be used for collaborative research, which gives the Centre an important international dimension. The data has been collected since May 2010 and its performance closely monitored to add invaluable resource for understanding how to design, operate and manage technologies for future low carbon buildings - both new build and retrofit. This paper reviews the performance of the building integrated renewables; solar thermal, PV and ground source heat pumps. It explores the designed building against real performance through data collected to date and identifies difficulties inintegrating, commissioning and operating renewable technologies.