I live in a semi rural area and I have a bathroom extension downstairs with a toilet and sink. I want to build a conservatory leaning to this and there is a drain, that water from the main roof runs into against the original house wall. I dont know exactly where it goes and I want to move it outside the conservatory do I need planning permission. Can I just put a new drain in and run it to the foul water drain round the back of the extension. the house was built about 1939
thankyou for any help
thankyou for any help