[SG] Terrain

I'm making some houses for SG terrain, and thinking I probably ought
to base them.  The buildings themselves are about 2" square in light
card stock (mini gift boxes, with the lid turned upside down for a
parapeted roof--these are Islamic Fed) and I'm not going to bother
with the interiors.  I'm probably going to mount it on matte board,
add spackling for texture and flock it.
Any suggestions as to
a) why I wouldn't want to base them, or
b) a better way to do it?