Morning,   OH and I are just about to complete on a plot in Dorset.  It currently has a 1950s pre-fab bungalow on it and we plan to demolish and re-build with an energy efficient house.  There is no mains gas or sewage and broadband isn't scheduled to arrive until 2017 at the moment, so GSHP is on the cards as well as solar PV and then a small treatment plant for sewage.  We're not sure what to do about internet access, but that can wait untl we're closer to actually having a new home