This may sound crazy but we are thinking of knocking down the wall between our bedroom and the boxroom and making a huge master bedroom. On one hand, I think this is madness and will knock value off the house however on the plus side, we would have a spacious master bedroom (not a great size at the moment), we don't really use the "office" that is the boxroom and we still have 2 extra bedrooms (we have no kids). Given that we don't intend to move ever again - this is our last mortgage given age etc. does anyone have any advice to offer? Would appreciate it.