Floor plan single-family house approx. 175 sqm with option to expand to a two-family house

So I have to agree with my predecessors here: the draft is clearly rubbish. Reasons:

[*]Bedroom awkwardly laid out (with a bed length of 220 only 50cm of space; dressing room unusable (if then the dressing room as a walkthrough room, but the width of 156 is stupid, you can’t put wardrobes on both sides
[*]Ground floor bathroom far too small: try furnishing it – doesn’t work
[*]Pantry too small and accessed from the living room: if so, leave it out
[*]Entrance area: cramped, no cloakroom, instead a crooked and large hallway
[*]What’s the door in front of the stairs supposed to mean?
[*]Living room: You want a table for 10-12 people (why?) but draw a smaller one. Compare the size of the sofa with the dining table and chairs – something doesn’t add up
[*]Staircase orientation is unfortunate on both ground floor and upper floor
[*]Upper floor corridor: crooked and waste of space
[*]Why does the guest room get the best side of the house (south-west orientation, loggia, most windows and the largest room in the house)
[*]I agree with the elephant: you can throw your money out the window more sensibly for an exterior appearance (the actually good calculation of about €3100/m² becomes obsolete because of this – especially with the fittings)
[*]I also like the big children’s rooms, but not like this

And here we go again: one of the first questions you deal with in your post is about accommodating the holy metal boxes – I always find that strange (we ourselves have two cars). Personally, I believe that a house only suits a life situation for a certain time. Possible separation I would disregard. Your children are small, why should they want to live in the same house with their parents? Obviously you don’t. But if it is indispensable: get a professional involved! Finally, the honest advice: better forget this “draft” completely and go to someone who knows how to plan. Proceed as follows: make a room program with a wish list and by no means bring this “draft” along. The planner should be free in their design.

P.S.: since this is repeatedly misunderstood: this is meant to be honest criticism and is in no way personal

I am new

The children properly park their bikes, unfortunately they tip over onto the car when they quickly go into the house for ....
Where is the jacket hung?
Ah yes, the child wanted to use the toilet. Damn, locked, mom is showering (Draw a shower, sink, and toilet in the bathroom below, plus a cabinet for towels, hygiene products, and cosmetics) Are you aware that every guest, every quick need goes into your bathroom with street shoes on?

You have no privacy on the ground floor in the planning, no cloakroom, a mini pantry that hardly holds anything, an extremely large hallway, similarly upstairs.
The guest lives better than you and that perhaps for someday

Almost every design from the prefabricated house providers works for the plot anyway. Why reinvent the wheel if you don't know? Then another city villa. Why put the garage in the south? Your neighbor certainly didn't build it in the north for no reason. So, garage or CP now?

ui ui ui, so first of all thanks for the comments. I actually take it objectively and don't see it as bad. Rather helpful. The points you list I don't see at first if you have tunnel vision. That's why the idea here is to think outside the box.

I really have to work on that again.

We already had an appointment with a builder. The appointment was such that he took note of our wishes, but now is creating the floor plan/design himself. I'm curious if that fits better.

Why the garage to the south? Your neighbor surely didn't build it to the north for no reason.

What now, garage or CP?

My thought was that I could then build garage to garage. In the north I simply have no neighbor because there is a green strip passing through. I would have to keep the building window (3m distance) and thereby lose width. I sketched it once on the site plan.

I would probably also leave the northwest side open in this case, as the evening sun shines beautifully there in the summer. For this property, I would take a look at the following orientation, as the restrictions for the house might be lower and, above all, there is more space for windows on the sunny side ... (the blue arrows indicate access for people and cars)

In the north I simply don't have a neighbor because there is a green strip running through there. I would have to comply with the building window (3m distance) and would therefore lose width.

A maximum half completion of the building setback within the green strip should be feasible.