If you want to use the side entrance as the "main entrance" for yourselves, then you also need to think about it again. I have acquaintances who use their side entrance as the main entrance for themselves. It’s practical, that’s true, but they come directly from the street into it and for them it doesn’t matter whether they unlock the front door or the side entrance door. But I doubt that you will always take the long way through the garage with your floor plan. If you come home by car – yes, but what if you are just on foot? Or the children come home from school. They don’t unlock the garage first – which is probably full of cars, bicycles and other things – they go through the utility room (which, by the way, often seems spooky to children) into the laundry room and into the house. It’s also worth considering whether you really need such a large utility room. Our utility room (air heat pump, all connections) is just under 4m2, our laundry room is over 12m2 and we are supposed to store rubber boots and muddy things there. But we also come through the laundry room around the corner directly onto the street. And you give away about 2 m2 of the 8m2 due to the doors and windows. My idea would be to make another access to the laundry room, namely where the storage room under the stairs is. It would also make sense to close off the laundry room at the kitchen level with a wall and create a kind of corridor between the kitchen, laundry room, and utility room. I would make the access from the utility room to the garage at the back towards the garage (possibly even just an outside door), so you don’t have to awkwardly walk around the room when you come from the garden. Maybe you can also enlarge the laundry room towards the utility room.