Floor plan: 150 sqm single-family house + granny flat - carport / garage + shed / workshop

Personally, that is too little "in the sun" for me. I wouldn't place a utility room, guest WC, or guest room in the nicest spot the house could have.

Oh, sorry - that probably came across wrong: Utility, guest WC are oriented to the north and towards the "big houses." Living room, guest, and bedroom on the upper floor face the beautiful southern garden :)

Hmm, if I were planning for two people, it would look completely different. Somehow it seems so loveless. Door to the WC on the ground floor at the dining table, dining and kitchen separated from each other, huge bedroom, still with a closet. Dressing room and bathroom also disharmonious. I don't know what actually corresponds to your wishes, but unfortunately I don't like it at all.

Hmm, if I were planning for two people, it would look completely different.

We are still open for ideas ;)

Somehow it feels so loveless. Door to the WC on the ground floor at the dining table, dining and kitchen separated, huge bedroom, still with a wardrobe.

I don’t see a problem with that on the ground floor. Upstairs we are already considering whether it can be optimized further. The wardrobe in the bedroom was added by the drafter.

Dressing room and bathroom also unharmonious. I don’t know what of this actually corresponds to your wishes, but unfortunately I don’t like it at all.

Would you like to describe that a bit more precisely regarding unharmonious? Otherwise, the general contractor has so far only adopted our plan in order to make a price calculation. So these are purely our ideas.

Oh, sorry - that probably came across wrong: technology, guest WC face north and towards the "big houses." Living room, guest and bedroom on the upper floor face the beautiful garden to the south :)

Ah, ok. I had read that differently. I'll take a closer look now :)

That probably came across wrong:

I guess you could call it that if someone is posting floor plans :-(

Otherwise, the general contractor has currently only taken over our plan in order to be able to make a price calculation. So these are purely our ideas

That almost excuses it, and as a price dummy it may be good enough – even though I cannot follow the tactic of approaching planning this way (but if you can, that’s fine – the main thing is that the process is developing toward a result).

Oh, sorry - that probably came across wrong: the technical room and guest WC face north and towards the "large houses". The living room, guest room and bedroom on the upper floor face the beautiful garden to the south :)

Again,
the technical room and guest room are oriented to the southwest/west. The utility room on the upper floor as well. And the garage is also in the best spot.
Yes, with the 5 meters (for the garage you said 3 meters would be enough), you have to tweak a bit, but I can make the west side freer in the sketches (which I initially oriented north for myself). South is great, of course, but working people only benefit from it on weekends. Therefore, it would be nice to also have some from the west. For me, the kitchen is pushed into the (north) tight spot; present in this house are the technical room, office, and WC. One should avoid the WC opening into the dining area. A south-facing window in the bedroom is not a pleasure either. Also, the bedroom serving as a through room does not exactly make those seeking peace happy when their partner is already rummaging around.

You can always distribute criticism. Here's a suggestion for a house for two: same room program, same external dimensions. The requested staircase...
Since I’m on the iPad, I’ll save the dimension chain and detailed explanations here.
Advantages: open to south and west, including terrace, open floor plan, thus light. Many windows, yet placed thoughtfully. Covered entrance.
If you move the garage one meter forward, you could swap the technical room with the WC. Both have advantages.
Disadvantage: light in the living room in the evening. When watching TV, the shutters probably have to be lowered. Shrubs provide privacy towards the street.
By the way: the staircase could also be rotated :)