I started this with a face 9 squares wide, and then went back for a total of 9 x 11. So, no, it's not entirely square. But, it has a very cool roof style that I didn't find easy, but might definitely try again. I also really like the way the interior turned out.
I started out with a standard stairstep face, and repeated it on the opposite side. Then in each corner I added an upper facing that began at three blocks high on top of the 'normal'; wall height of the bottom story.
I filled in windows in both upper facings and then began to resolve the roof, which is always the hardest part, to make it look 'natural' and not have holes in corners etc.
It took a couple of tries to get the bottom corners working properly, and a structure inside as well (shown below) to fill in the gaps properly
And then I could make the glass and door and torches and begin to work on the interior rooms.
now it is ready for beds, rugs, banners and tables and chairs. And this is what it looks like from the outside, with what is built nearby so far. This is my "Zayama Railway world" in 1.16.5, vanilla, survival mode (currently on peaceful). I've still got a lot more iron to find to connect all of the stations that have been made, including a big seaside one to the North (you'll see that listed as Windgrass in an upcoming post). But I thought I'd play with some interesting houses while waiting for other things the past few days.