Floor plan single-family house 1 full floor technology and daylight

Yes, I already suspected that it would look like this. You should prioritize this decision above all others: What exactly is the peak supposed to be developed for? Experience shows that hard-to-access spaces are rarely or hardly used. This ladder from the architect is tiny, steep, and narrow. It will already be difficult to get a suitcase up there. If he shows alternatives, he should please also show the entire floor plan with them!

If the attic is permanently accessed via a staircase, it is usually also developed in terms of, for example, development reserve including insulation, wiring, and all the other trappings. That, of course, costs money and only pays off if the rooms are also needed and, of course, offer space that provides real added value. Where you are, you can barely stand under the peak. So as living space, rather nothing. As storage space it would still work, but should it then be a "warm roof"? Under a cold roof, the storage options are again somewhat limited. For just Easter eggs and tinsel, maybe a folding ladder with a hatch will suffice, like most people have.

The additional staircase to the attic, on the other hand, significantly restricts your choices for floor plan ideas. Without the attic development, you will quickly find many suitable ideas. Just select more than 5 rooms and 1.5 stories at Danwood. You will surely find some hits there.
Developing the peak quickly reduces the selection to zero. That is why this decision is not trivial.

If he shows alternatives, he should please also show the entire floor plan!

I have that too, but I would rather not post it here and I cannot send a private message yet.

Attic is intended as storage space and retreat (so insulated), not as living space with a second escape route, etc.

Assuming that the rest of the floor plan is not compromised thereby

The attic is intended as storage space and a retreat (so insulated), not as living space with a second escape route, etc.

Assuming that the rest of the floor plan below does not suffer from it

That doesn’t sound like a plan, if you ask me. If the budget is limited, this will probably be cut first. Or how much do you want to spend on drywall, a second staircase, flooring, windows, electricity, heating, insulation, wallpapering, and painting under the roof? Who is supposed to retreat there and what is so expensive that it’s worth this additional "development cost" for storage?

As I already said – you must not expect fully-fledged living spaces. Not with this house depth and height, and you didn’t want to be bigger anyway – on the contrary. What you might imagine is perhaps a playground for the kids on the floor with a train set and Carrera track, if you can get them up there piece by piece. Nice to have with 2 fully-fledged children's rooms on the upper floor, I would say.

Therefore, once again the advice: think carefully about what this is worth to you, as your attic scores below average in terms of price-performance ratio and the other floors may possibly suffer because of it.

The additional staircase to the attic, on the other hand, significantly restricts your choice of floor plan ideas. Without the attic conversion, you will very quickly find many suitable ideas. Just select more than 5 rooms and 1.5 stories at Danwood. You will surely get some hits there.
The development of the attic space quickly reduces the selection to zero. That's why this decision is not trivial.

Yes indeed, without a developed attic you find more, with really less, I quickly found only 2 houses, Denker and Löwental.
We didn’t have a concrete use in mind, that’s true, it was just an idea (a la teenagers want their peace somewhere other than the bedroom). So far, no one has said that it could be a problem for the floor plan. Another example of why I feel a bit left alone after 4 months.
That more storage space only hoards more junk is then rather obvious.
For me, an insulated hatch is enough to at least hide a few things that don’t belong anywhere else.