Upstairs toilet

Shouldn't need planning permission as long as your not changing anything structurally. Normally you just need to be able to tee into a soil pipe outside. If you can't do this then a saniflo would suffice

Depends if you’re in England or Scotland. Not sure about English planning law, however in Scotland if you need to break into the underground drainage for the soil pipe you might need a Building Warrant with a drain test done when complete. If you can connect to the existing soil or use a SANIFLO you should be OK. There’s also a possibility you’d need a change of space and a plan drawn up though for Building Warrant most council planning depts. are ok with a basic drawing.

Hi Anything is possible Depending on where your waste, hot and cold water feeds are would dictate the extent of the work's No planning would be needed Thanks, Peter

Strictly speaking, such a job should be covered with an application to Building Control. You can do this online: estimate the price for the work at five thousand and pay the fee. I can't say that I've ever seen that happen though! Most people would choose someone they believe to be competent and get on with it.