Single-family house cube without roof with full floor

Oh dear, that sounds like the rude awakening is still to come. The 2k savings from Deine Polentreppe won't save you then, I'm afraid. But let's see. The house isn't that big. Is there actually any indication here anywhere about the property or site plan?

You think so? I think 280k just for the house is already quite a lot, then there's still the architect, garage, garden, etc.

Yes, coming soon

Yes, yes, it can work. But for that, we still know far too little about your house. The bad part is, you don’t either. But it will be fine.

Where should it stand? What is the ground like? Is there a slope? What utilities are connected? What heating do you want, which is affordable for you?, energy saving regulation, windows, security, floors, walls, fireplace, sanitary... the list is long. The only thing I know so far is a moderately sized house with an expensive flat roof and a Polish lattice staircase.

Not that I need to know all of that, but you have to know it for your financial plan. Therefore – first comes the needs plan (rooms, area, wishes), then the design, with a rough budget specified. Then you look at how to stick to the budget. Then you plan the details and only then can you eventually talk to the bank. At least that’s how I know it.

You think so? I think 280k just for the house is already quite a lot, then there's the architect, garage, garden, etc.

Yes, coming soon

For 280k just the house, about 150 m² without garage etc., could already work with Polish companies. Standard equipment, no big gimmicks.

Otherwise, it will be significantly more.

And if I think that an interior design can and indeed should be mixed, it is precisely these contradictions that I like

No one is questioning your interior design, but according to your explanations, it is not clear where the journey is supposed to go. So the house, to me, reads like a conventional city villa without a roof or a cubic Bauhaus with symmetrical windows? Since the frame should match the content, it is difficult to give tips here. Especially since your questions are not answered. Without a site plan, for example, I don’t make a pencil sketch.

This is a new development area where the architect has built about 200 single-family houses in the immediate vicinity (!).

I don’t want to believe that. Then it is more likely a developer or general contractor – an architect probably cannot meet 200 clients according to HOAI.

But it is surely clear that in a standard floor plan from xy construction, bottom right, there are a bunch of stairs within 125sqm.

To me, this is actually too black and white here. If I browse through all the floor plan discussions here, I wouldn’t say that only 125sqm is standard or that 200 plus is individually planned.

Symmetry and (single-flight) straight staircase together create multiple surfaces (cf. "overhang mandates" in parliaments) and then require floor areas on the order of 120 to 150 sqm (per floor!) upwards. Whoever does not believe it "pays" for it with bottlenecks in corridors / dressing rooms / guest toilets etc.

I usually enjoy reading your posts because they often contain a lot of truth, but this is now complete nonsense.
We have a straight staircase, ground floor 110 sqm and upper floor 95 sqm. We do not really have bottlenecks.