Floor plan of a townhouse 150 sqm with gable roof 6 rooms

Regarding the building application, I would simply inquire at the building authority.

The utility room upstairs is actually intended to be a maximum of 7 sqm as well, equipped with a washing machine, possibly a dryer, and a cabinet for towels, bed linens, etc. We find it practical to be able to wash the laundry directly upstairs where the clothes are stored.

Basically, I can say from my own experience that it is super convenient and practical to be able to wash and dry the laundry right where most of the dirty laundry accumulates. Of course, where exactly this place is depends on the individual habits and living circumstances of a household. Do you mainly use a dryer or do you love hanging freshly washed laundry outside? Does the majority of the dirty laundry come from worn work or gardening clothes, outdoor activities, or (small) children?
Depending on the answer to these questions, the possibly ideal placement of the washing machine and dryer (if you use one) basically results.
I can only report from my own experience: rental apartment with a laundry and drying room in the basement vs. washing machine + dryer in the family bathroom (in our case on the ground floor), where most of the dirty laundry first accumulates --> super convenient that we no longer have to feel like running thousands of stairs but everything more or less accumulates in the same spot.
If I were to build new and accordingly create a room program to take to a planner/architect, one requirement would be that the washing machine and dryer are again on the same level as the family bathroom (even if I would prefer a separate room, but our house doesn’t allow for that).
Long story short: I personally like the idea described above a lot, and I think that if this plan is realized as intended in the floor plan drafts, you will be very satisfied with it.

We are still clarifying the budget. The first draft was around 370,000 € and thus below our budget. That’s why I’m curious where we would end up with the expansion.

Oops... 370,000 € for 150 sqm is simply too little if you take 300 €/sqm as a basis.
By the way: the floor plan of 11 x 9.5 with the upper floor is about 170 sqm and consequently worth 510,000 €.
But everything fits. In my opinion, there is a bit of excess space on the upper floor.
For sightseeing from the couch, you can still plan a nice window on the left side of the plan and place an eyecatcher in the garden along the sightline.

If you only keep the one wardrobe, then I would place it opposite and, as already discussed, rather include the door to the guest room in this hallway. Then you could also turn the sofa again, if desired. Are you leaving out the sideboard on the other side?

Oops… €370,000 for 150 sqm is simply too little if you take €300/sqm as a basis.
By the way: the floor plan of 11 x 9.5 with an upper floor is about 170 sqm and consequently worth €510,000.
But everything fits. In my opinion, there is a bit of excess space on the upper floor.
For sightseeing from the couch, you can plan a nice window on the left side and place an eye-catcher in the garden on the sightline.

Thanks for the drawings with the measurements.
But the stairs remain quite steep with you too, right?

The €370k is not our budget, but the offer price for the first floor plan draft.

I think we will take the middle way and go for 11x9 m. Then we will get about 160 sqm. And I still think that will fit the budget.

If you only keep that one wardrobe, I would place it opposite and, as already discussed, rather include the door to the guest room in this hallway.

I just noticed, because you pointed it out to me, that I wasn’t finished up top left yet… I just needed the project space for something new. Yes, 1.50 is not great. I definitely wouldn’t plan the guest door there, that eats up resources. More likely then under the stairs and then shorten the utility room. There is enough (expensive) storage space now.

The stairs remain quite steep with you too, right?

They are 3.90 long.

The 370 T€ is not our budget, but the offer price for the first floor plan draft.

No, but still too cheap from the planner!

I think we will go the middle way and opt for 11x9m.

And then create bottlenecks again because of the narrow 9 meters… why 11 x something? Why not 10 x y?