Advances in information and communication technologies [ICTs] offer the opportunity to improve the way energy profiling tools and techniques are used to measure and inform the energy performance of buildings throughout their lifecycle. The exploitation of this potential is one of the goals of a current EU FP7 funded project, entitled “IntUBE - Intelligent Use of Buildings' Energy Information. The overall aim of the project is to improve the energy performance of new and existing buildings via the intelligent use of buildings' energy information. The focus of this paper is on the tools being developed within this project to inform the design process. Its main aim is to illustrate how current building design and assessment tools can be integrated with an environmental assessment trade-off tool to support design decisions at both the conceptual and early phases of building design. To do so the paper presents a discussion of the functionality of the tools and techniques currently being developed, which illusrates how it can be used to support improved building design, with regard to the inclusion of renewable energy technologies, passive solar techniques, building internal layout and sustainable construction materials.