Basement with 165 cm room height after insulation in an old building

And what is the room height without insulation?

The corridors of our basement are also low (180 cm), there were repeatedly injuries. Our solution is foam rubber at the "dangerous" spots. In the long run, however, I would not recommend it, you run out of curse words.

Well, if the house is otherwise suitable, the (partially) low basement is a luxury problem. I don't want to live in the basement, but go the way to the washing machine 3 times a week. Screw it.

Hello SirMarkus

consider the "Tieferlegung". a good friend of mine did that.
Lower the foundations and dig out the ground. Not quite easy, but doable.

Steven