Hi all. We are looking to make some structural changes and add a small extension to our house in the next few years. Our main issue is that our staircase is at the back of the house (behind the kitchen) and we'd like it incorporated into the main hallway. For various reasons (plumbing mainly) we don't think the stairs can be moved so instead we'd be looking at knocking through a wall to incorporate it into the hall. If we do this, we'll need to build on a small extension for a utility. I'm looking for an expert to advise us on the feasibility of this/recommend alternatives and draw up plans as well as advise us on possible costs. Who should I approach? TIA