I have planning permission to build a double garage in my garden and I
am looking for some advice regarding the foundations.

I am hoping to get away with a 1M deep strip foundation but there is a
hedge on one side so I assume I will need to go a bit deeper on this side.

The bigger issue, though, is that a sewer pipe run under where the
garage is to be built and this will likely clash with the foundation
concrete. I would rather not move the sewer pipe. What are my options?

Can I run the foundation concrete round the pipe if I somehow line the
outside of the pipe so as to leave a gap for the pipe to move within the
concrete? Would this be allowed and would this work? I know I have to
get the building inspector involved at some stage but I want to do a bit
of research first.

If this is not possible then can I build a raft foundation slab instead
and build the garage in this slab?

Or what other options do I have?

Thanks, Brian