Your floor plan is quite similar to mine, except that we want to build with a basement.
I think your floor plan is very good. If I were you, I would consider the following things.
- Are you sure that you are planning for 3 children?
- I miss the often mentioned bathtub
- Laundry room / guest WC, I’m not sure how the large window is supposed to be solved but I’m not an expert
- I would probably leave out the recessed entrance area or at least ask what it would cost
- I would design the living area open, i.e. leave out the wall
I don’t see that you have too little storage space. It’s certainly not generous but adequately sized. On the ground floor you have a storage room under the stairs and on the upper floor the laundry room. If you need more storage space, just raise the knee wall a bit and if necessary the roof pitch.
I also don’t see that your bedroom is too small. It’s certainly not huge since you have to compromise on either the bed width or, as in your case, the dresser. That means either a narrow bed or leaving out the dresser.