Is the base plate properly sized?

haven't you hired an independent construction expert (Bausparvertrag), especially since the construction site is not just around the corner and you are construction laymen. Otherwise, the general contractor can tell you whatever. My advice, hire a Bausparvertrag immediately and inform the general contractor.

haven't you hired an independent building surveyor (building savings contract), especially since the construction site is not nearby and you are laypersons in construction. Otherwise, the general contractor can tell you anything. My advice, hire a building savings contract immediately and inform the general contractor.

Yes, we have. The first planned appointment is the shell construction inspection. That was the building savings contract's suggestion. ‍♂️

Yes, we did. The first planned appointment is the shell construction inspection. That was the suggestion from the building savings contract. ‍♂

OK, great.
So you also sent the pictures and questions to the building savings contract?
And the forum is used again for confirmation?
What did the building savings contract reply?

OK, great. So you also sent the pictures and questions to the home savings contract? And the forum is there again for reassurance? What did the home savings contract reply?

That is still to come. I only noticed the topic yesterday. The forum is there to show me whether I am worrying unnecessarily or if something might have gone wrong. It is currently general holiday season anyway.

I can't see that clearly in the photo, but the strip foundation usually extends over the concrete slab with this construction. The facing brick is then placed directly on the strip foundation.

By the way, I suspect you are right. The concrete slab only extends to the inner edge of the foundation. You can see that quite well in this photo. Then the insulation / outer shell would be placed on the foundation. That surely also has advantages in terms of insulation, if it is decoupled from the concrete slab.

The astonishing width of the "stripes" also speaks for it. Are those 80cm?

You wouldn't allow that if there was no clinker or masonry there. Firstly because concrete is expensive and also because you simply can't get a drip edge where water can drain...

Really just a plaster facade, clinker prohibited? That would have been useful with the wall construction. That's why the lack of offset fits as well, because your plan section shows no offset of the inner house wall and the garage wall. Ergo, the floor slabs should have no offset.