A rather carelessly thrown-together draft...
Why the large window around the corner on the ground floor? Sure, it’s stylish, but it doesn’t fit here and instead disturbs. The kitchen can’t properly "unfold," resulting in a dining area that hardly deserves the name and a huge amount of free space in the middle that remains completely unused.
Think about what kind of kitchen you want, how big the dining area should be, and the windows should be arranged accordingly — not the other way around.
Usually, you need more space for the dining table than for the living room — and often it’s planned exactly the opposite. What do you do in the living room corner? Sit a bit on the sofa, watch TV, be lazy — consider how many square meters are appropriate for that. And how dumb it is, on the other hand, if there isn’t enough space around the dining table...
Dressing room without a window and too narrow! Access to the bedroom is better through the dressing room than having a trapped dressing room inside the bedroom. And what’s with the dance hall in front of the bed? That leaves little space to the right and left beside the bed...
I also fear that the utility room will be too small for a house without a basement — at least if a washing machine and dryer are supposed to be there too and maybe occasionally a drying rack for laundry. Or is that supposed to be in the open space in the living area??? I wouldn’t want that...
Better to consider a utility room on the upper floor — that’s where the laundry happens! And if I take the dance hall out of the bedroom and shave off a few square meters from the larger children’s room, an extra utility room would still be possible.
I would also always consider putting all the piping on one side of the house — so either move the bathroom over to the kitchen side or vice versa.
If the extra room on the ground floor is not needed, I wouldn’t plan it or at least make it significantly smaller — and thus have more relaxed space on the ground floor.
Items that are rarely used can certainly be stored in the attic — but it’s really no fun and with two planned children, you quickly have more "urgently!" needed things than you might imagine. And you don’t want to constantly carry them up and down.
The exterior views are hideous, sorry. Although I’m also a fan of arranging windows according to function and not arranging rooms to have outwardly pretty windows, you can still take a bit of the exterior view into consideration.
To me, the entrance area is too narrow — also visually I find the standard-width front door without side panels ... well, let’s say politely "suboptimal."
With two children, possibly both still in strollers/prams, the hall is definitely too small. Where should the stroller stand in winter?
There are standard floor plans that are better.
And I agree with 11ant — think outside the square, even if the general contractor would like it that way. With a rectangular floor plan you always have more window options relative to the floor area than with a square — or the other way around: with a square there tends to be dead, lightless space in the middle. I don’t like it...