sorry poor drawing on the plan. There is a door from the hallway to the livingroom.
I get the points about going through rooms etc. the garage conversion is currently our play room. So we need to go through the utility room to get into it. Without ripping out the relocating the WC this is the only way. I feel the livingroom, kitchen, playroom flows a lot nicer than Kitchen, utility, playroom.
Got a structural engineer coming out this week and had a family
friend come in who’s done similar work who’s said it will probably need steel goalposts.