roof low pitch

Hi all, we are planing to build an extension to the rear, 5m wide, 4.5 meters deep The original idea was to build 4.5 meters deep extension in the roof style similar to the neighbouring properties (see attached picture and "extension variant 2" plan, btw already 12' pitch), ie. tiles + roof...

Hi all, We're looking to do apply for planning permission for an extension. I've doing the planning permission plans myself, but will get someone who know what they are really doing to make the plans for the builder and building regs etc. We're sure what we want with everything except the roof...