How much deviation is acceptable when masonry is done?

Small update. My suspicion has been confirmed. The structural analysis for the upper floor was a bit too optimistic in the original plan, and after calculation, the wall between the bedrooms had to become load-bearing. However, the doors no longer fit because of this, and it affected the hallway and the staircase. And apparently, they failed to inform me about it...

There is a saying in construction

The carpenter works to the mm, the joiner to the cm, and the bricklayer is happy if it hits the right plot.

By the way, there are also 50 cm wide base cabinets :p

So I was at our shell construction just a week ago - everything fits almost exactly to 1mm or exactly. Except for one wall length - it's 3mm too long. My site manager says the shell builder is allowed tolerances up to 1cm. More than that must be reworked (good luck).

Your example shows me again why I didn't build with a general contractor. It's a damn black box.

Why actually 40cm - that can't be?

I mean, it's even more, depending on the length of the wall.

Why actually 40cm – that can't be?

I still need to clarify why they are planning 40cm stones for me when apparently they don't exist.

By the way, there are also 50 cm wide base cabinets

There are even 40cm ones. Saving 10cm shouldn't actually be a problem, we currently have a 100cm one in the middle. We'll just reduce it to a 90cm one. But the stress that the house won't fit... I would have liked to have avoided that.

I still need to clarify why 40 cm bricks are planned for me when they apparently don't exist.

I am not sure if maybe in Austria they do exist after all.