This is a very small building made using pieces of from the WarLayer 3D Printable Terrain Kickstarter. The pieces are very modular, and remind me a lot of the old Erector set toys that I used to play with as a kid. All told, this was made using about 37 hours of printing time.
I should say that the horseshoe-shaped piece making up the “door” is ridiculously fragile and broke both times I printed it. I was able to glue one of the pieces together, though.
Like an Erector set, you can assemble and disassemble the pieces as you see fit, or glue them together. I’m wondering if the relative frailty might make gluing them together a better idea.