Where do I start? SWMBO wants an extension and I am not so sure.
We need facts - who should we go to who will have experience of planning, building control, and costs so that we can then decide if it is feasible to continue.
Getting a builder doesn't seem right as they have a vested interest in getting the job and may not err on the side of caution with planning requirements.
I would like to know if it is feasible before getting quotes.