Floor plan of a single-family house with 3 children's rooms and a double garage

Maybe you could start again?

Okay, sorry. I thought the information was sufficient. So, I will start again:
My wife and I are planning a single-family house in a new development area. We recently received the first draft from our planner and would like to get your feedback as well as suggestions for improvements and changes.

Development plan / restrictions
Plot size = 470 sqm
Slope = no
Floor area ratio = 0.4
Plot ratio = ? (could not find anything about this)
Building window = as indicated in the development plan
Building line and boundary = garage on boundary max. 9m. Distance to neighbor = 2.5m. Distance to street = 3m
Edge development = no
Number of parking spaces = 2
Number of floors = 2 full floors

Style = SD, vPD, PD, WD, FD
Orientation = see development plan
Maximum heights/limits = WH: 7.5m; GH: 11m; GH (FD, PD): 9m
Further requirements = roof pitch SD, vPD: max. 40°; WD max. 30°; PD max. 15°

Requirements from the builders
Style, roof shape, building type = open, single-family house, SD or PD
, floors = without basement, 2 full floors
Number of people, ages = 35, 34, 2, 0
Room requirements on ground floor = shower bath, office/guest room, utility room, open living, dining & kitchen area, space for wardrobe & groceries
Room requirements on upper floor = master bedroom, 3 children's rooms, bathroom, storage room
Office: family use or home office? Mostly home office
Overnight guests per year = regularly grandparents
Open or closed architecture = open living, dining & kitchen area, otherwise rather closed
Conservative or modern construction = good question...
Open , kitchen island = open with kitchen island
Number of dining seats = room for 8 would be nice
Fireplace = no
Music/stereo wall = no
Balcony, roof terrace = no
Garage, carport = double garage
Utility garden, greenhouse = no
Further wishes/special features/daily routine, also reasons why this or that should not be =
We would preferably like a solution for the living room that it is somewhat "separated" from the kitchen, i.e., without a direct line of sight. Maybe a corner solution.

House design
Who did the planning:
- Planner from a construction company
What do you particularly like? Why?
- Storage space under the stairs
- Straight staircase -> easy to walk (my wife's wish). Half-turned with landing would also be okay
- Garage sufficiently large for cars, bicycles, bike trailer, etc.
- Parking space in front of the garage -> Bad parking possibility on the street and we often have overnight guests

What do you dislike? Why?
- All-purpose room too small, everything feels cramped
- Side entrance not through the garage but outside -> Utility room is supposed to serve as a mudroom. But if we work in the garden,
we always have to open the garage door first to get into the house. Leaving the garage door open all the time is also not ideal with small children.
- 2 of the 3 children's rooms are small. Compared to that, the master bedroom is too large
Price estimate according to planner: €499,700 (based on a similar design from another provider he wanted to improve. We do not yet have a price estimate for the current design)
Personal price limit for the house, including fittings: pain threshold = €600,000
Favored heating technology: air-water heat pump

If you have to do without, which details/extensions
- you can do without: difficult
- you cannot do without: office

Why is the design the way it is now? e.g.
Standard design from the planner? "Improvement" of a plan from a competitor. Pitched roof is now the planner’s standard design
What makes it particularly good or bad in your eyes? The design is nothing special for us. Basically everything is included but, in our opinion, not very skillfully implemented. Rather a modified standard floor plan. The layout upstairs is bad.

What is the most important/fundamental question about the floor plan summarized in 130 characters?
How do we get 4 bedrooms upstairs without bloating the floor plan? Is a studio in the attic maybe an option (if allowed at all)?

Thanks for your help and have a nice weekend
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Which was the improved (?) competitor model?

Which was the improved (?) competitor model?

I have not shared it here. Is that relevant?

The draft is nothing special for us. Basically, everything is included, but in our opinion, it is not particularly well executed. More of a modified standard floor plan. The layout on the upper floor is poor.

The main problem is: architectural draftsmen have not learned designing and therefore polish everything into construction drawings, regardless of (and whether at all) the maturity level of the draft reached. Forget this draft completely across the board and first go to a planner who designs. But then let them do their job and don’t bring back specifications from a "wrong" guideline. There aren’t really any “standard floor plans” for a family with three children, and even less so with a fourth child (“office”). Any modification can only make things worse.

How do we get 4 bedrooms on the upper floor without bloating the floor plan?

That is "the easiest thing in the world," in two steps: #1 by distributing the room program accordingly (the office is a classic candidate to be the last choice); #2 by planning the upper floor first (see also bauen-jetzt “The upper floor has priority”).

I did not share that here. Is that relevant?

It often helps to understand the "medical history" where the wrong turn was taken during planning.

Living area too small, everything feels very cramped/pressed.

Yes, I noticed that right away too

Layout on the upper floor is bad.

That too.
Both are due to the staircase location!

Side entrance not through the garage, but outside -> the utility room is actually supposed to serve as a dirty airlock. But if we, for example, work in the garden,

The side entrance is overrated and completely irrelevant with the current design.
On the one hand, behind your "dirty airlock" is the kitchen with the living area, where you first have to cross the island, then walk through the whole house to finally take off jackets and shoes. On the other hand, your garden is on the other side.
How do you expect to sneak past the cars?
And then your laundry area will be there too. So you might also have to sneak past clean laundry.

Suggestion: place the house entrance there. But make sure there is space for cabinets behind the door.

- 2 of the 3 children's rooms are small. Compared to that, the parents' bedroom is too large.

Yes, that's due to the stair position.

Basically everything is included, but in our opinion not implemented very cleverly.

One should free themselves from the idea that you can create such an essentially different floor plan on 80/90 sqm than these standard plans. After all, a house design or the life within it depends on the individual little things and of course the personal furnishing.
A room simply has more potential when it is rectangular rather than angled; the living area simply takes up half the floor... every room wants a window somewhere, and so on.
I am a fan of "think different," but that doesn't necessarily mean it's better for a family of 4 or 5.
You can recognize the general standard by the living area, which actually requires less space. Instead, the dining area should have somewhat more space.
And yes: this desire for the straight staircase, which takes so much and gives nothing...

"Improvement" of a competitor's plan.

That would interest me as well. Usually, improvements like that don't work.