Looking forward to digging into the forum for some research and help with the upcoming project..  We've got a 1968 house in West Sussex..  Its now gutted after Asbestos was found in nearly everything!  Pretty much got 4 walls / ceilings and a roof left!  planning on new extension with ASHP  / underfloor heating..   Project has taken so long to start that we are coming to the 2 year mark of non occupancy that the council have confirmed this with an official letter..  So fingers crossed for a 5% build..   Hopefully this forum has some advice on claiming the vat back and what you can and cant claim for..  thanks in advance to community on this forum..  Simon