As usual, I have found that the Finnish National Archive is a great resource for all aspects of bushcrafting from small scale to large. Currently they are digitizing their collection of construction plans from Viipuri Province. Apart from building plans there are also blueprints for chairs, doors etc. The Archive is updating the database on daily basis, but I will try to keep up with them and update this thread as I found something that might interest you. For starters I have collected some of the most interesting blueprints to us to see.
Outhouse
Outside storage for logs
Sauna
Another sauna
Small house for a family
Outhouse
Outside storage for logs
Sauna
Another sauna
Small house for a family