I am considering to remodel my kitchen. It currently sits in the very back of a typical village house. Unfortunately, right next to the bedrooms. I'd like to move it to the front in the living room as a open kitchen. My biggest worry is trying to set up the gas, water and gray water pipes. They all currently run down the outside in the back, hence the location of the kitchen and the bathroom. I'd prefer not to run the pipes along the outside of the house because it would have to reach around the entire length. I can't reach through the inner wall because of the stairs. Has anyone ever tried to lay the pipes through the floor? Would that cause structural problems? This is on the 1st floor. Can anyone with construction experience offer advice?