These are three houses modeled after houses in the Drassen Airport level of the Jagged Alliance 2 video game. The houses are modeled in a scale of 1 square = 20mm, which should be about 1/50, close to 28mm wargaming scale. Rescale as desired for other scales.
You can print the houses (except the roof) in one piece, but in my experience print quality is much better when the various parts are printed lying down flat and assembled afterwards. This can be achieved by setting the offset variable in the OpenSCAD files to a value larger than 0, exporting the STL, importing in your slicer software, and then split the file (at least that's how it is done in Slic3r) and rotate the parts to your liking. I have included exploded files for all houses and the roof. Rotate the roof parts by 20 degrees (the roof angle) to have them lay flat.
The designs are not fully parametric, some dimensions are hardcoded. Modification shouldn't be too difficult.