Building Regulations/Construction Drawings

I need an architectural designer/technologist to help with finalizing building control and construction drawings which will also be used for thames water build-over agreement and for party wall notice. This is for a small single story extension (3.85mx6.06m) I have designed for one of my clients. Most of the materials and construction build-ups have been defined as well as quite a significant amount of the specs/suppliers. There will be drainage design and structural design done by others which you will be provided with to coordinate as well as coordinating with info from manufacturers. I would prefer a Revit user for this although the structural engineers drawings and drainage design will be provided in DWG.

I will favor someone based in the UK or with experience in UK projects. Please let me know how much you would charge for the whole work to be finalized in the next 3-4 weeks.