@IndySo below are the prices per sqm and sqf as per our quote and what we are working to.  I've worked out the total size of the house floors (walls included) which is the gross external, then the gross internal (everything except the external walls, so these includes studwork and eaves voids on 2nd floor) then our final actual usable internal floor space (which excludes studwork and eaves storage on 2nd floor):   Sqm Gross External
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