http://images.search.yahoo.com/search/images?_adv_prop=image&fr=mcafee&va=pigeon+lofts


http://www.angelfire.com/tx/pigeon550/kitbox.html


http://www.portablelivestockshelters.com/Pigeon_Housing.html


http://i255.photobucket.com/albums/hh145/gabe454_bucket/100_0618.jpg


A nice example of kit boxes.  There are three individual boxes "under one roof".