Garage base draws water - defect?

One must distinguish between moisture that rises from below through the plaster and moisture that ends up on the base from rain splashes off the paving. The latter cannot be avoided without a gravel strip, but is probably less serious since it dries off. The former requires sealing with sealing slurry or similar.

I will now contact the construction company as the next step.

This is definitely the right step.

Objectively, calmly, and competently point out the issue, show it, then find a solution together. There will definitely be a solution!

I wish you all the best of success.

Best regards
Thorsten

Did the construction company also do the paving work?

One must distinguish between moisture that rises from below through the plaster and moisture that lands on the base from rain splashes off the pavement. The latter cannot be avoided without a gravel strip, but is probably less serious as it dries out. The former requires sealing with sealing slurry or similar.

Then I have to check at the next rain whether it is splashes from the pavement or whether the plaster is absorbing moisture from below?

Did the construction company also do the paving work?

No, someone else did the paving work.

@ FlorianA

lastdrop beat me to it. Additionally, I would ask what your BU recommended for the paving around the garage.

To identify a "culprit," you need a few more details. For example, whether the paver was a commercial business, and what the general consensus in the discussions about moisture was.

Rhenish greetings from the road
Building expert