So i was thinking about a house wich only purpose is storage, it cant be entered, it cant be moved, is about as big as a Stonestead and only accessible from the front door.
The amount of storage... maybe 3x pages of 25x25?
+ space for barrels, logs and other stuff.
As for the building materials
Block of wood
Planks
Glass
Rope
Bricks
Steel
any common metal.
thatching materials