Just starting to renovate a property, architect plans and have builder booked just waiting for planning. As soon as we get a site meeting and get to the finer detail I will speak to the builder. In the meantime I'm wondering what the options are. It is a dormer bungalow and currently on the large gable end there it the soil pipe from upstairs which runs vertically down the wall, then horizontally to meet the downstairs bathroom. No renovation happening upstairs, so what do we do?