I would say the windows are too big for a building being located so far to the north. I think you also lack cloth and whatnot for decoration and heat saving. Beams would do well in the ceilings, and yeah.. more wood anywhere would be fine. I hope the building won't be placed on a flat surface like that when you've implemented it into the rpg. The terrain you got now is too repetitive and evenly sloped.
what are those tiny bricks that make the chairs and can someone please give me a link?
I tried making them smaller but it just looked kind of weird and boxy.