Here are some links to some good one's.If you have or know of any post the links for us to share. http://www.figurkrigsspil.dk/filer/th_15mm_houses_2.pdf http://www.figurkrigsspil.dk/filer/ww2_houses.pdf http://www.figurkrigsspil.dk/filer/th_15mm_houses_1.pdf once you have your temp. ,print them out on plain paper.
I use a good quality 2mm cardeboard(not the plain brown stuff).Here is what I mean a Motherboard box.
Then using white glue, glue them to your cardboard.Once it is dry cut them out.
You must also make a base - you can use the measurements from your temp.I always make them bigger and trim them later. Now take your front,back and 2 sides and glue them to form a box.I use pins to hold things together.Then glue corner supports into the corners.I make the supports by glueing multiple pieces of card together.