Our construction cost overview - It can also be "affordable"

Wall thickness?
Roof: Clay or concrete? Brand? Model? Insulated/uninsulated? U-value?
Electricity: Number of sockets etc.? Basic version or premium etc.?
Central switch?

a floor heating system with smart home control in every room.

That can mean anything, from simple remote controls, to NEST, to tablet controls. So what will be installed?

Windows: No shutters as I see... U-value?

As asked before, what does your construction service description say?

The construction performance specification is unfortunately at my office. I don’t know all these values by heart... sorry! Should I? I’m not building the house myself – professionals who have been trained are doing that. When I get hold of the documents, I can gladly look up all these data for you. But I can’t give you exact values or the brand of the heating control. Those are details that were discussed but haven’t been installed yet. We have 36.5 cm Ytong and no insulation on top of that! That I can tell you. We have no roller shutters because we wouldn’t use them anyway. So that was an unnecessary item for us. I really don’t know U-values off the top of my head. The electrical work was just installed but I have no idea how many sockets we have in the end. It’s all very individual. And the price per square meter is just a very subjective value for me as well. Certain things have to be installed anyway. Also in a 50 square meter house. Which then appears more expensive after all. I don’t want to annoy anyone here. I thought it would be nice for planners to also see numbers way below 500,000€ or more. And if you don’t believe me that we’re using good quality but just want numbers, then unfortunately I can’t provide anything before Monday. Sorry.

No, you don’t have to have all the values in your head, but you claimed that building cheaply is possible.

I just want to show you that it’s not as cheap as you think.

You hit the nail right on the head here:

Certain things have to be installed anyway. Even in a 50 square meter house

Every general contractor, construction company, builder, etc. has their own standards; for one it’s cheaper, for another it’s more expensive.

You are right that many things are individual, but every house needs walls/roof/windows/electrics etc.

And that’s exactly where the problem lies. To be able to compare whether a build is cheap or expensive, you have to come to a common denominator. So you would actually need all the values.

I don’t want to annoy anyone here. I thought it would be nice for planners to see numbers far from €500,000 or more.

You’re not annoying anyone here, I also paid less than 500k for my house. You just have to find the right partner when building, then the price will work out.

And it is also possible to build for less, you just have to look at all the new development areas with all the 0815 houses from Town & Country and other mass producers.

But you just can’t claim that you’re building cheaply, at least in my eyes... IMHO you’re in the good average.

Thank you for the pictures
Depending on the area, 1500 € is quite possible - depending on the area under 2000 € is also difficult.
We have the phenomenon here that east of us there is a very poor district and west of us a very rich one... a 30% price difference in the offers was normal there.

I am convinced or rather certain that our house stands far apart from the Town & Country standard. That was actually one of the selling points of our construction company. They directly used the aforementioned company as a negative example. In our circle of friends, a few have just had prefabricated houses built. Here too, I can already identify the qualitative differences. Especially when it comes to clean workmanship, but above all to technology. No-name heating systems that take up the entire technology room, for example.

As I said: all documents are in my office because our interim home doesn’t provide space for them.
But if I hadn't been 100% convinced, I wouldn't have built. And the other offers from other companies were either much more expensive (with the same quality) or simply didn’t match our idea (we categorically reject chipboard, styrofoam, and ventilation).

. For €12,000 we then bought wall paint, floor coverings, and sanitary fixtures.

Here you can clearly see the point of such price comparisons. We paid almost exactly €12,000 as an extra charge for sanitary and bathroom tiles during sampling. The standard was already advertised as high-quality, and we still don’t have the feeling of installing something particularly unusual...