Single-family house, two floor plan variants from the architect

Hehe... for me it was at the beginning "what about the roof pitch, then I'll plan" ;)
Well then:
Ask yourself what the second leg of the ground floor corridor is supposed to be for? I came across this because I questioned the pantry for myself, at least this sliding door, which I rather saw from the corridor. Because what is the pantry supposed to be used for? Right: among other things for beverage crates ... and why should you carry them around the whole interior of the building? ... Exactly! Door at the bottom of the plan.
The same applies to the dressing room upstairs: door at the bottom of the plan, then the other space waster (second door) can also be omitted.
I find the children's room size okay.
Since you are well within budget, I would widen the house by at least 50cm.
A house with dressing room and office on 140sqm has never been comfortably planned under 150sqm.

The leg is there so that
1. the kitchen has a door and you don't always have to go through the living room, which is sensible, right? And
2. my husband is not such a big fan of the open-plan concept, he does it for my sake and he thinks then the kitchen is more separated from the living room. But I haven't found any other good solution for it either, do you have any idea?

I want the pantry to be accessible from the kitchen, because the fridge, Thermomix, etc. should also go in there, practically as an extension of the kitchen for everything that doesn't look so nice if it’s left out. We don't have beverage crates.

I just imagine it to be practical in the bathroom if you have direct access from the dressing room, somehow I can't let go of that ☺️

I also agree to widen the house a bit, can we do 25cm at the top and 25cm at the bottom? Then the bathroom and dressing room would benefit and also the living room, or is it not that simple?
Thanks again for the exchange!

the kitchen has a door and you don’t always have to go through the living room, that makes sense, right? And

You can design the kitchen door without a corridor and then adjust the pantry somewhat in size and shape.
A 60 cm cabinet is enough for Thermi and co. Once appliances move to another room, they won’t be taken out again that quickly.
While you open this sliding door, every second woman has diced an onion for you.
I just noticed that the windows in the kitchen are too few... the other windows: a little pep wouldn’t hurt.

2. my husband is not quite such a fan of the open living concept, he does it for my sake and he thinks that way the kitchen is more separated from the living room. [...] I want the pantry to be accessible from the kitchen, since the fridge, thermomix etc. should go in there as well, basically as an extension of the kitchen for everything that doesn’t look so nice when it’s out. We don’t have any drink crates.

Okay, then two points are clear now: First, you can crumple up the plan, as corrections are necessary that won’t work behind the comma, so replan everything. And second, your initial question is resolved, or rather has answered itself by reduction of possible answers to one.

Ad first. If the polyhybrid space is not supposed to be “just” a pantry junk room/laundry room but additionally also a “backup kitchen,” then it is decidedly too small. Then half a meter more width (not depth!) will by far not be enough to make the floor plan solution “work.” Sodastream instead of drink crates is not decisive here; this single point doesn’t make a big difference. Ad second: with the new draft, only the variant with the fireplace placed against the outer wall remains possible. You describe your husband as someone who only agrees to the open space as a concession. Actually, the L-shape of the open area could make this concession easier for him, if it weren’t for a crucial trick: because of the fireplace before the open space turns, what comes behind the corner becomes an “ambush” – with the consequence that he would perceive this open space as uncomfortable. A deer cannot graze if it’s afraid; that is a serious problem. In the relaunched draft, the open space can therefore remain, including its L-shape, but then the fireplace must disappear from the danger spot. If you have to redesign anyway, then also eliminate the Jekyll/Hyde double role and perform a separation operation between, say, a junk pantry kitchenette but then please a separate laundry/utility room. You have to decompress/relax this multifunctional powder keg from just under five to a minimum of twelve square meters in total.

What began as an apparently harmless optional taste question now turns out to be a narrowly averted misplanning in two crucial dimensions. That was already more exciting than all the crime novels of the whole week.

Overview/Location of the garages:

This is represented differently in the site plan and in the floor plan.

Are you allowed to position the garage that far forward?
- Sight triangle of road users
- 1x parking length of a car in front of the garage to open the door

You can execute the kitchen door without a hallway and then somewhat adjust the size and shape of the pantry.
For Thermi and co, a 60cm cabinet is sufficient. Once appliances move to another room, they usually won’t be taken out that quickly.
While you open this sliding door, every second woman has diced an onion for you.
I just realize that the windows in the kitchen are too few... the other windows: a bit of pep wouldn’t hurt there.

Thanks for your suggestions.
Two of my friends have exactly the same setup with the sliding door and also a similar size, so I decided on it. I have already tested the practicality several times.
Definitely regarding the windows, I also want a fixed one in the kitchen facing north. I am thinking of a narrow, elongated one. Also to watch the children in the yard, etc.

You can design the kitchen door without a hallway and then somewhat adjust the size and shape of the pantry. For Thermi and company, a 60 cm cabinet is enough. Once appliances are moved into another room, they won't be taken out again anytime soon. While you open this sliding door, every second woman has diced an onion for you. I just realized that there are too few windows in the kitchen... the other windows: a bit of pep wouldn't hurt there.

Kitchen door without a hallway, I've been thinking about that half the night (thanks to the baby) and just can't come up with any way how that should work.