ᐅ Basement – What is the minimum clear ceiling height required for living spaces?

Hello everyone,
I hope this is the right subforum.
We want our basement to be just a little higher so that we can also accommodate a guest there. The basement will be fully equipped technically. Now, the building specification states that the basement has a rough structural height of 2.20 m (7 ft 3 in)… but our offer includes the approved higher height. However, it is “only” 2.38 m (7 ft 10 in)! My question is:
What is the remaining clear ceiling height from the 2.38 m (7 ft 10 in) once the floor and ceiling are finished? We will also install underfloor heating in the two main basement rooms. I have no idea how much space the screed, plaster, and so on will take away. Can anyone tell me?
Thanks a lot!!

Is that really enough space for living areas? Normally, a floor structure including insulation should be around 15-18cm (6-7 inches) thick. With more expensive materials, you might be able to save about 5cm (2 inches) more.

However, meeting the requirements for living space according to the national building code seems difficult. You should have a proper offer for a residential basement prepared. Don’t forget to consider emergency escape windows and similar requirements. Otherwise, it won’t work.

We do not want living space down there. It should be potential overnight accommodation and a hobby cellar. A utility basement is completely sufficient for us. My question was, how much of the 2.38 meters (7 ft 10 in) remains? So about 2.20 meters (7 ft 3 in)?

Even a (temporarily used) bedroom is considered living space.

Well, then we'll just make it two hobby rooms. So, what ceiling height do I have to work with for pursuing my hobby?

Fire insurance companies, by the way, are not happy to have to pay out when the insurance conditions are not met.