Lovely done.

Practical  information, not only for scratch building. Also for kit bashing and other scales.

I noticed two things that ought to be corrected:  The tiles are overlapping the ones in the row above, the brick bond is stretcher and not English. There is a lot of information available on the internet about brick bonds and how to layout buildings if you want to model the prototype properly. (I've been researching whilst making my own building specific brick papers.)

It is otherwise a good introduction with many tips and techniques.