Single-family house planning, 200+ sqm, with basement - Thank you for the feedback

You are planning with one bedroom for later. How limited in movement do you think you are?
You are planning with a straight staircase. Stairlifts don’t cost the world.

Take a look at your floor plan.
8 sqm airlock, 1 m closet?

Kitchen block too small.
Minimizing the distances means pantry accessible from the kitchen.

What are you doing with the basement? Is it just for laundry tourism?

Living room no table, no cabinet for CDs, books, games, whiskey collection?

Two dining areas separated only by a wall.
Draw in the seating arrangement, it will be tight around the table.

Dressing room
Are you planning the cabinets without doors?
1.98 is the raw construction measurement.
You have no meter between the cabinets.

For me, room 1 was also a children’s room. The information was missing there.
I would still plan a parent wing and a children’s wing.

What do you have from the view? You are only there to sleep.
You’ll get less from the teenagers later as well.
I would really plan a master suite with bedroom, dressing room, and bath.
Give the dressing room more depth.
Give the other side to the children and use the study as a buffer.

Really draw the furniture with a ruler and pencil. Consider the movement flow. Imagine what is supposed to go in each room.
You come home. Key tray, shoe cabinet, seating, hooks, dresser for bag, scarf, gloves. Go through the processes.

I agree with Haydee and add, what is the pantry really supposed to be for? So many dishes?

And, saving 2 or 3 meters when shopping because you don't want to put it in the basement and absolutely need access from the garage, but then have to walk several meters each time you use it.

How will the path from the kitchen to the terrace be with the dining table positioned sideways? Slaloming around it.

The guest room, however, is not well suited as an optional real master bedroom on the ground floor, because you can hardly fit a wardrobe once there is a double bed in there.

Basically, I find that for such a large house, free spaces are rather impractical and not generous for the rooms.

Should the building be demolished? - at least I would leave the outbuilding standing: tearing down a spacious garage in the north to then put up a single garage in the south seems pointless to me.

What borders there to the south? - that looks like commercial (craft business).

Are you having trouble with your children or why are two rooms on the south/west side unused all day?