Stumbled across this blog http://100wildhuts.blogspot.co.uk/
Some lovely designs for permanent shelters...But some take monumental hours, people & effort to construct. Read the description of each hut, he's a real urban Bushcrafter.
Loving the insulated walls on some of the later constructions.
Not great square lashings
http://www.alastairhumphreys.com/wil...icroadventure/
http://markbeaumontonline.com/my-fir...-hut-building/
The latest, #19 is a great shape