Building generator with free Sverhok add-on.
The file includes the panel walls
and the Sverchok node tree.
To use the generator you have to have Sverchok add-on installed.
You can download Sverchok from here - https://github.com/nortikin/sverchok
but if you open the file and the building does not look like it looks in the vidoe then reinstall sverchok from here - https://github.com/nortikin/sverchok/releases/tag/vstable9
In the tool tab of the property panel in the 3d viewport editor you can find all properties which I found interesting to play with.