Roofing Completion for Side Extension

I have a side-extension that measures roughly 1 m x 6 m and sits alongside a permitted-development build that is otherwise finished. The only element left to tackle is the roof. I need a skilled roofer... (Budget: £10000 - £20000 GBP, Jobs: 3D Modelling, AutoCAD, Building Inspection, Building Regulations, Construction, PHP, Roofing)