Planning phase floor plan single-family house

Here again quickly with measurements..

Personally, I would do without a bath, one shower downstairs, two showers upstairs for 4 people (I'm assuming that now) seems a bit exaggerated to me. I would rather try to accommodate an additional room as a storage room. Is there a reason why you want so many showers?

The idea was: one for us, one for two daughters, and one for guests. Then guests wouldn’t have to go upstairs to shower and the children wouldn’t have to go downstairs to shower. And sharing one shower between four people with four identical wake-up times doesn’t work..

Ok, with 2 daughters it's a different story again ;) If that's the case, I would only plan a small 80cm shower in the guest bathroom, otherwise the toilet will become too cramped.

Hello again,
so we also have two bathrooms on the upper floor and have therefore decided against a shower in the guest WC. This also has the advantage that the "public" bathroom can be kept clean more easily. I assume you don't get overnight guests very often since there is no guest room either.
What about load-bearing walls? I don't see any load-bearing walls on the upper floor that rest on load-bearing walls on the ground floor. What does your upper floor ceiling rest on? I think the structural engineer will have fun with that ;-)
Do you want to always lead your guests through the kitchen into the dining room?

By the way, we also easily fit the same room program + study into 180m³.

Your sofa is 2m wide? :D wow. Take the shower out of the ground floor - you don’t have a guest room downstairs anyway. Move the toilet together to 1.2*1.95 and enlarge your wardrobe. This is not functional. I think the kitchen is okay - it is already generous - I might possibly omit the bay window, compress the kitchen a bit and turn the dining table - it fits perfectly on ~8.1 m * ~3.8 m. The living room is furnished in a ridiculous way... lots of open space. You could certainly reduce about 15 m² there. Alternatively, move the dining table into the living room and save space in the kitchen. The utility room is also very spacious at 20m². Possibly separate the technology.

Before I write something pointless, it would be appropriate to know whether you are building with or without a basement, what kind of room in the north with 15 sqm that would be, why you need a living room space of 40 sqm (okay, a 4-meter long sofa has to fit in ;)) and whether you are deliberately - assuming the financing is available for unnecessary sqm - inflating the rooms by about one third because you want it to be "generous." I ask because there are people who have no spatial awareness and thus no sense of how much 10 or 15 sqm of area actually are. Others want to find generosity in their many (more than others) sqm... What do you want?

The size contradicts itself again with a small highlight: A dining room bay window was common in the 80s to slightly expand small rooms.

Regards Yvonne