Purchase decision small semi-detached house 100 sqm from 1930

In the model building code as well as in most federal states, the minimum room height for habitable rooms is 2.40 m, but the regulations range from 2.20 m to 2.50 m and allow exceptions for habitable rooms in small residential buildings as well as in attics.

Yeah, okay ... but regardless of building regulations et cetera, a room height of 2.30 m is not dramatic, or am I overlooking something here? In our rental apartment it is 2.25 m and we have never felt uncomfortable or cramped here.

Why the surprise? 2.30 meters is perfectly fine, isn't it?

Yes and no. Of course you can live with it. But 2.5m is definitely nicer and airier. Hopefully, you don't intend to rely exclusively on spotlights? They should actually only be used selectively and where really necessary. Proper lamps (whether on the ceiling, walls, or floor lamps) also belong to the lighting. And then 2.3m with lamps hanging still looks really sh... sad.

Feel free to lower the ceiling in the hallway, but please not everywhere. Nowadays, when building, people are more likely to look at how much more than 2.5m they can get. Why? Because experience shows that 2.5m should be the minimum.

P.S. You can also use flat spotlights. For that, a 24mm substructure + 12.5mm drywall is sufficient.

Yes and no. Of course you can live in it. But 2.5m is definitely nicer and airier. Hopefully, you don’t want to rely solely on spotlights? They should actually only be used sparingly and where really necessary. Proper lighting also includes "real" lamps (whether on the ceiling, walls, or floor lamps). And then 2.3m, with lamps hanging down, really looks sh... sad.

Feel free to lower the ceiling in the hallway, but please not everywhere. Nowadays, when building, people tend to look at how much more than 2.5m they can get. Why? Because experience shows that 2.5m should be the minimum.

P.S. You can also use flat spotlights. For that, a 24mm substructure + 12.5mm drywall is enough.

Thanks for the hints. Then I should probably think carefully again about the ceiling height. With the narrow substructure + drywall + slightly higher floor construction, we'd be at about 2.40m room height. Unfortunately, that also means – floor and ceiling heating are out. :-( That leaves wall heating, or the good old radiators. Or milling into the screed – which apparently isn’t exactly simple.

Phew, no, you don't take down the ceiling. Spots are boring anyway. ;)

I haven't read everything yet, but just from the outside, you could even consider converting the basement rooms facing the street. For example, as an office. Otherwise, I agree with Yvonne. As soon as the development plan, current floor plan, and site plan are known, we can look at it together. Maybe a conservatory as a dining room extension or something similar is possible if it really gets too tight later. Definitely buy if things are as they are. :)

or just the good old radiators.

The good old radiators nowadays come in a very modern form and also offer options such as low-temperature heating. I wouldn't get hung up on underfloor heating.