Here’s a nice piece of wargames terrain that makes me think, for some reason, of “The Great Escape.” From Steve Winter comes these instructions for making a corrugated metal hut.
Here’s a set of instructions on how to build a variety of buildings for your colonial wargames.
DJK’s Fantasy World has a nice three part series on how to build model houses from coffee stirring sticks.
I’ve tried a variety of different methods for making thatched roofs for my miniature wargames buildings. This one from Ryan Skow works well.
Mitch’s Wargaming and Model Making Blog has a short illustrated article on making an English Civil War style house. I’ve used similar techniques to build a town of houses for my Gothic Horror games.