This is a HO scale building. It is a brick building with commercial on the first floor and an apartment on the second.
Here are the files and how to use them.

Main building This is the main structure including four outer walls and interior first floor walls. Print 5 together. _c1 : The brick color of the walls _c2 : The Black infill (this is used so if lighted at night, light won't shine through walls. Combine with _c3 if this is not required) _c3 : The inside walls _c4 : The concrete sidewalks and the very top of the walls _c8 : The back doors

Second Floor _c5 : This is the walls and floor for the 2nd floor apartment

Roof _c6 : The black tarpaper roof section _c7 : The silver parts of the roof vents and AC units

Windows and doors These parts fit into the main building. The c1 file is the color of the frame and the c2 is a black frame to block light leaks. C2 can be omitted if not lighting the structure.

sm window_c[1-2] : print 3 of these std window_c[1-2] : print 10 of these lg window_c[1-2] : print 2 front door_c[1-3] : print 1