The main storehouse is the Headquarters of your settlement and acts as your pimary Storehouse. Clicking on the building opens your inventory of produced items and unassigned millitary units.
As a storehouse its contents are instantaneously shared with all other storehouses you build and therefore no items need transfering between them.
The big advantage of all Storehouses is that every production building's overall production time is directly affected by its proximity to a storehouse. It is therefore advantageous to carefully place buildings that produce goods (Copper Smelter, Brewery, etc) as close to the stores as possible and those that also consume a deposit (Masons, Fishermen, Hunters, etc) between the deposit and the Stores.
Items stored in your Star Menu are dropped on the Mayor's House to add them to your current supply.
|Level||Resources Required||Upgrade Time||Increase|
|1 > 2||800 hardwood planks and 450 marble||2 min. 30 sec.||+1,600|
|2 > 3||400 coins and 450 marble||1 hour||+1,500|
|3 > 4||750 exotic wood planks and 900 coins||24 hours||+3,000|
|4 > 5||1500 Exotic Wood Planks and 1800 Granite||7 days||+4,000|
It should be noted that at every level it is more cost effective to upgrade a regular storehouse over upgrading the Mayor's House.