Feasibility Single-family house - Cost statement / Financing realistic?

How on earth do families with 2 children live in 100-120sqm? :p
No offense meant, just to show that it could definitely be done smaller, even without a basement.

Absolutely right, there are also families who live in even less space. I think it always comes down to making compromises or sacrifices in certain areas. Here, I’m more afraid of regretting for 20 years not building a bit bigger. The more storage space a house has, the more unnecessary things get bought or not thrown away :-) The plan would be to store lawnmowers/garden furniture etc. in a garden shed anyway.

Better to spend about €50,000 more and have 180m² instead of 130m².

But since the square meter of living space unfortunately costs not €1000 but €2000-2500, it is not €50K but €100K-125K... Plus higher additional maintenance costs.

Since the square meter of living space unfortunately costs not 1000 but 2000-2500€, it is not 50K€ but 100K-125K€... In addition, higher ancillary costs for maintenance.

That's probably true :)

That's why I'm also a fan of the basement...

The ancillary costs are significantly lower here - things are "nicely" stored centrally and you don't have oversized large rooms on the ground/top floor that you also have to clean/maintain properly and ultimately pay for.

If, like the OP, you really need a lot of space and therefore want to build 180m², I would rather build 140-150m² with a basement. If you don't need a [weiße Wanne] (of course it depends on the building area) then you can manage much more practically and at a similar price level than if you build 180m².

Then you also have all the technical equipment in the basement, you don't get annoyed by the washing machine and the laundry itself, and you have a large tidy storage area with additional design options as a hobby room or similar.

But it's also a personal preference. Not everyone likes to go down to the basement so often and gladly, but rather prefers to have everything on 1 or 2 floors. The OP has to know what he prefers.

That’s why I’m also a fan of the basement... The additional costs are significantly lower here – things are "nicely" stored centrally and you don’t have oversized large rooms on the ground/floor attic that you have to properly clean/maintain and ultimately pay for. If I, like the OP, really need a lot of space and therefore want to build 180m², I would rather build 140-150m² with a basement. If you don’t need a white tank (of course it depends on the building area), then it’s much more practical and at a similar price level as building 180m². Then you also have all the technical equipment in the basement, you’re not bothered by the washing machine and the laundry itself, and you have a large neat storage area with additional design options as a hobby room or similar. But it’s also a personal preference. Not everyone likes to trudge down to the basement so often and willingly, but prefers to have everything on 1 or 2 floors. The OP needs to know what he prefers.

I’m completely with you! Unfortunately, my wife doesn’t see it that way yet. Hopefully, the upcoming architect appointment can change that. Furthermore, there are also things that cannot be so easily stored in a storage room because due to their shape or size they don’t fit in a cupboard and therefore inevitably have to be parked somewhere on the floor. Then you build 180m² instead of 140m² with a basement and effectively also only have 140m² of "living space" available. Price-wise, both variants should be roughly in the same range. In my opinion, however, you do have more space available with the variant including a basement. Ultimately, everyone has to decide for themselves!

I totally agree with you! Unfortunately, my wife doesn't see it that way yet. -.-* Hopefully, the upcoming architect appointment can change that.

Furthermore, there are also things that cannot be simply stored in a storage room because, due to their design or size, they don't fit into a cupboard and therefore inevitably have to be parked somewhere on the floor. Then you build 180m² instead of 140m² with a basement and effectively also only have 140m² of "living space" available. Price-wise, both options should be roughly in the same range. In my opinion, however, you do have more space available with the basement option.

In the end, everyone has to decide for themselves!

I am simply of the opinion that the house can never be as "practically tidy" as with a basement... Of course, as storage space the basement is very expensive, no question, but I have everything in the house and don't have to constantly run to a garden shed, a garage, or somewhere else. Nowadays, the basement really belongs to the house - compared to earlier, when people didn't like going into the COLD basement xD