Generating 3d building from 2d floor plan,Creating a 3d enviorment with a floorplan

Has anybody ever supplied a 2d floor plan and generated an indoor 3d environment? if yes what did you do rather than extracting the useful thing manually such as walls?

Also, what did you do to achieve it and make it to real-world scale?

Finally, how did you tackle multiple floors?

Reason for this question I’m trying to augment indoor navigation but would like to skip the manual work of building each wall manually

See any of the ProBuilder videos and demos. That’s what it’s for.