Single-family house floor plan, feedback

Development Plan/Restrictions
Size of the plot -> 833m²
Slope -> no
Floor area ratio -> 0.4
Building volume ratio -> 0.8
Building window, building line and boundary
Edge development -> no
Number of parking spaces -> 2
Number of floors -> 1
Roof shape
Style
Orientation -> SW
Maximum heights/limits -> 9.0m
Further requirements -> no

Requirements of the builders
Style, roof shape, building type -> Classic single-family house with gable roof
Basement, floors -> 2 floors, of which 1 full floor
Number of persons, age -> 46, 41, 12, 10 and 8
Room requirements on ground floor, upper floor -> see floor plan
Office: family use or home office? -> mainly home office
Overnight guests per year -> /
Open or closed architecture -> closed
Conservative or modern construction -> conservative / classic
Open kitchen, kitchen island -> closed (with sliding door to dining area) + kitchen island
Number of dining seats -> 5
Fireplace -> no
Music/stereo wall -> no
Balcony, roof terrace -> no
Garage, carport -> garage
Utility garden, greenhouse -> no
Further wishes/special features/daily routine, also reasons why this or that should or should not be

House design
Who designed it:
- Planner of a construction company (draftsman)
What do you particularly like? Why? -> Generally like the ground floor, but we would swap office and kitchen + living and dining areas
What do you dislike? Why? -> children's rooms too small // no daylight in the hallway // bathroom should be accessible from the hallway // windows not aligned vertically
Cost estimate according to architect/planner -> €570,000
Personal price limit for the house, incl. equipment: €550,000
Preferred heating technology -> heat pump

If you had to compromise, on which details/extensions
- You can do without -> children's bathroom and utility room (upstairs) can be combined into one room
- You cannot do without:

Why is the design the way it is now? e.g.
Standard design from the planner? -> no
Which corresponding wishes were implemented by the architect?
A mix of many examples from various magazines...
What do you think makes it particularly good or bad?

Hello, I look forward to suggestions and improvements.
Regards

Consider the budget for the architecture, house size, garage, and additional construction costs to be significantly too low.

Others will comment on the floor plan.

Geschossigkeit -> 1

At first glance, without careful calculation, this is a single-story building.

What kind of space-saving technology is supposed to go into the technology?

At first glance, without doing any precise calculations, it’s a single-story building.

Exactly, that’s how it should be

What kind of space-saving technology is supposed to go into the utility room?

I asked myself the same question, but it’s only an implied lightweight partition wall that would only be built after installing all the equipment. Therefore, the utility room would be larger in this case and the laundry room smaller accordingly, which shouldn’t be a problem since laundry is supposed to be done upstairs.

I consider the budget for the architecture, house size, garage, and ancillary construction costs to be far too low.

Where would you see the budget? The calculation even already includes the kitchen, outdoor area, photovoltaic system, and a 10k buffer. Our future neighbors even found the allocated 550k to be very high...

I consider this to be a 2-story house ... ah .. you mean all the corners in the ground floor that are becoming expensive and then all require flat roofs, making it a single-story.

Unfortunately, the uploaded images are so poor in resolution that you can hardly make out the numbers.

But somehow the floor plan of the ground floor looks very inefficiently used.

Price .. it is over 200 sqm, with brick veneer, lots of corners, so I also consider 550 kEuro for everything to be too low. Are there actually any suitable offers already available?