Any Asset for building floor plan + 3D in runtime?

Hi, i’m planning to create a stand-alone app which creates floor plan in 2D and transforms the same into 3D walls on a button click or something.

Is there any ready-made asset which allows me to do it?
Or, is what would be the ideal idea to build a 3D floor plan?

Looking for something like this:


Opensource 2D Floorplan to 3D Walkthrough

Floor Map Designer