The issue of creating stepped foundation walls is one that comes up quite ofter and I'm sure you have your own method of tackling the issue. This is one I like to use, but in this segment I have also added a method to include a brick ledge as well by unlocking the top constraints of the wall through the structure of the wall type. Sorry - no sound.
The image is grainy when at full screen. I will try to fix this and re-post.