The smart energy masterplanning tool makes innovative use of GIS technology to analyse the geospatial inter-relationships between energy demand density, development implementation programmes, physical constraints and cost information. The tool allows users to interact with detailed, evidence based energy masterplans, based on large multi-variant data sets, in a time efficient manner.The outputs from the tool are visualised through Google Earth to help all stakeholders easily understand the impact of future development on energy demand and the most effective strategy, on a local level, to connect and deliver energy to identified loads. The ability to objectively analyse and graphically present complex data assists in the prioritisation and programming of decentralised energy schemes. This provides an evidence base for the development of policy and helps to maximise the potential benefits delivered to communities.