After obtaining planning, i got my building controll aplication under way. I had 2 options - Pay £1100 for Building Notice - Pay £900 for Full Plans.   Everyone on here recommends full plans, and it was a cheaper fee. I knew i'd have to either pay for the plans or do them myself. I opted to do them myself after loads of research on this forum (particiularily inspired by @HerbJ )   Here's my version of Herb's spec.   Building Regulation Specification Redac