Floor plan 200m² single-family house, raised ground floor, existing plot, double garage

How nice it is, how often one is misunderstood on the internet.

Now I'm unsure. What exactly do you mean? Because of the West terrace?

From 170 square meters without a basement is quite possible.

Now, please not this discussion. It's not just about 3 children's rooms here. One also wants an office, a dressing room, a laundry room, a pantry, and the rooms shouldn't be too small either. But the original poster is flexible, that's something. Let's see where this journey goes.

Just for understanding: Your parents have their access from the top left of the plan...? Is that correct? You are getting an access from the top right of the plan. That means you are located in the second row and no stranger has to find you anyway, right? What kind of arguments are those that the architect is bringing up? A comprehensible argument is: the short and functional path applies. With this plot orientation to the north or east. And then over the ridge side of the house, because then the room layout becomes more effective. That has proven itself.

We share the access that comes from the top right of the plan. I also attached a picture so you can imagine it better, and on the cadastral map you can also see the shared driveway.

The arguments are ****, but you wouldn’t notice that with a good seller. That’s why I was glad about K a t j a, who explained to me why access via the east side makes more sense.

Just a little suggestion: if your comfort zone is at 650k, for 200 sqm not many special wishes remain. Try planning with 170-180 sqm, that is still very sufficient for 5 people and the finances become much more "comfortable." Take a look at floor plans from the big prefab house manufacturers online – that shows what is possible...

GD

I am aware, 180 sqm was the goal, but fitting about 15 sqm children’s rooms seems impossible for architects.

Now I’m unsure. What exactly do you mean? Because of the west terrace?

Now please not this discussion. It’s not only about 3 children’s rooms here. You also want an office, a walk-in closet, a laundry room, a pantry, and the rooms must not be too small either. But the OP is flexible, that’s already something. Let’s see where this journey is going.

The terrace doesn’t matter to me right now, because it already fails at a reasonable floor plan.

The children’s rooms remain firmly at about 15 sqm, just like an office.
What is a walk-in closet? What do you imagine it to be? Apparently something different than me.
If the bathroom is above the technical room, the utility room with laundry chute can also be integrated, but that was already too much for our architect.

The terrace doesn’t matter to me right now, because it already fails due to a proper floor plan.

This doesn’t work. The terrace is the center of life in summer. You put it on the plan together with the house first. This decision is at least for me the basis of the entire rest of the planning. First of all, a dressing room is an extra room only for cabinets with clothes. Depending on its level of comfort, it may also contain a dressing table or a walk-in closet – there is hardly any limit upwards. Here in the forum, it is usually just a separate room from the bedroom so that you don’t wake your partner when you get up.

What is a dressing room? What do you imagine it to be?

A room for wardrobes and thus the action area in front of the wardrobes separately and not integrated into the bedroom – just as you drew it yourself. That is another 3 sqm more than with conventional planning.

That’s why I was glad about K a t j a, who explained to me why access from the east side makes more sense.

But you didn’t address that at all.

I’m not stuck on this,

Yes, you are quite stuck with your parameters. Everything seems non-negotiable or you are not willing to compromise.
First it was the cold storage room that absolutely had to be set at half height, then it felt like the roof surfaces and house orientation, then the terrace location.
I’ll take the part with the children’s rooms as an example of how inflexible the thinking is.

Upper floor: Too convoluted, children’s rooms don’t have 15m²+

Three rooms, each at least 15 m².

3x 15m² child

I’m aware, 180m² was the goal, but to squeeze in ~15 m² children’s rooms seems impossible for architects.

The children’s rooms remain immovably at ~15 m², just like an office.

but to squeeze in ~15 m² children’s rooms

immovably at ~15 m²

However, the following is also stated in the initial post:

If you have to give up something, on which details/extensions
-can you do without:
roof terrace
KFW 40 standard
wood stove
wide garage
utility garden
15m² per children’s room

Personally, the episode with the “arguments” about the west terrace comes to my mind then.
If I want to look something up in the initial post, I notice other weird things again: the pantry is supposed to serve as an acoustic barrier, there is fear of noise from the technical room, but the full-room stereo system is wanted for all-around sound in the open living area.
When I then read there are three children, I think of children laughing, family life, which is very likely to be more present noise-wise than anything else. I wouldn’t worry about a humming of technology there.

The inflexibility, e.g. to achieve nice children’s rooms or the office with minimum sqm, is a big mistake. Either you can afford it or you cannot. There are such nice and spacious 12 sqm children’s rooms that can easily compensate for other badly planned larger rooms. A good plan, a good design does without sqm indications, 3-4 must-have dimensions are enough to make a house/a room functional, but even those dimensions are not set in stone if a compromise leads to an almost 90% house design.

I come with one more problem:

We share the access path that comes from the top right of the plan.

The existing property has a double garage/carport of 6 meters and set back from the boundary. Then there is another garage in the middle, where it is unclear whether it will be newly built or already exists.
As the preliminary planning currently stands, at least in the plans submitted to us, 9 meters of width of the plot are claimed here. You then have practically 17 meters left for garden and house. Incidentally, for me also a reason to try the house rotated.

Furthermore, I don’t see the roof at all being included in the planning. I would probably look to minimize the ground area, also put the cold storage as a storage room in the raised ground floor, on the upper floor the children’s rooms with utility room, and the parents’ rooms under the roof. Wishes like second wind turbine, dressing room, pantry, minimum sizes etc. arise or not. And if an optimum with terrace location or whatnot is not reached, then you accept the half-optimum. You can live well with that too.
I have to laugh just now because I just dug up this apt post:

The much work turns my brain into applesauce.

The terrace doesn't matter to me right now,

But that contradicts the fact that there is at least one cardinal direction where you _don't_ want it.

Unfortunately, there is not much to gain from the side. The standard recipe is 2 children's rooms and an office/technical room on the ground floor. When we looked back then, for the demand field 3 children's rooms we mostly only found 200 square meter houses. From 170 square meters without a basement is already quite feasible.

With one more child (or home office) and the target size of 170 sqm, you take a 140 sqm catalog house and extend its wheelbase, done. That's an advanced warm-up exercise.

There are quite a few forums online. Maybe you'll find inspiration there.

Don't say such dangerous things here.

The existing building has a double garage/carport of 6 meters and set back from the boundary. Then there is a garage in the middle where it is unclear whether it will be newly built or already exists.

Oh - I hadn't thought of that at all. With the existing garage, we already have about 6m of boundary development. If the second garage were built, it would be 12m. The usual maximum is 15m. Do we have an exception here? If the old building is removed, the existing rights may expire? Then you would have to plan a 3m distance to the east boundary.