Different Room Height on the same level

> @valhallarie said:
> You can always try putting the main house on foundation and then a small stair to base ground where your living room is, MadameLee!

I have done that... but I build a lot of modern houses and the ability to mix and rooms with small, medium and tall walls would give my creations the proper look, I also tried using the half walls as well to give them the proper height but it messes with my ability to put a roof on them. I'm stuck with only a flat roof