Excel table for construction costs - Are there still important items missing?

Hello

We are planning to build soon.
For this, I have created a small list.
Could you quickly take a look and see if I have forgotten a major item?

What did you forget?

The question arises in itself, do you want to do everything yourself, or award each trade separately? Are you buying the tile adhesive for your tiler????

I haven’t seen: chimney sweep for the inspection of the fireplace!
Where is the underfloor heating? Or do you really want panel radiators for the heat pump?
Building insurance is missing.
Is there really still a 3.5% property transfer tax in Bavaria?