Access from the garage to the utility room

It wasn’t meant negatively at all, the discussions here have already helped me at one point or another. I just wanted to illustrate it for you once more.

Regarding your original thought: you still have to open two doors – whether front door + gate or 2x interior doors, in my opinion you haven’t gained anything. You could even open the garage door from the inside with a button before putting on your shoes. And when you open the front door, the garage door is already open.

Now I’m curious, what does the floor plan upstairs look like?

Because we are just chatting. Would you plan all the walls downstairs from KalkSandStein for noise insulation reasons? The wall of the kitchen/utility room still worries me a bit (topic hanging cabinets, etc.)

You can attach anything to sand-lime brick! It is really very solid.

From the perspective of mounting options alone, drywall is easily feasible, only that the relevant sides should then be double-layered or otherwise clad for wall cabinets, etc. The issue of noise development must be considered depending on the living/situational context or according to one's own perception of what and from when something bothers you. Moreover, sound is not only transmitted through the wall. With KS, it's just as good as insulated drywall.

Is KalkSandStein more expensive than the insulated drywall variant you mentioned?