Outposts and workshops

First thing's first, what are the requirements and restrictions? Easy, they have a base cost of 300 and they can only be built as an attachment to an already existing building such as a village or castle. They cannot be build on top of each other. One can even be attached to the Guild Hall.

What are these "Outpost" and "Workshop" buildings?

Well workshops are used primarily to refine resources but can also be used to make things. And outposts can be a few different things depending on the upgrades.

Normal conversion rates:
T1 : T2 = 100 : 1
T2 : T3 = 10 : 1
T3 : T4 = 10 : 1

Workshop
At the start a workshop is just an empty building, but you can pay more to have one of the two paths ready when the workshop is constructed. That said the two paths are not mutually exclusive, both can exist in the same building.

Equipment
Equipment 1,  50 Gold, Staff can convert up
Equipment 2, 100 Gold, Staff can convert up
Equipment 3, 150 Gold, Allows staff to have a conversion rate of 8 : 1 rather than the 10 : 1

Workspace
Workspace 1,  50 Gold, The upper value limit of items made is 1 gold
Workspace 2, 100 Gold, The upper value limit of items made is 10 gold
Workspace 3, 150 Gold, The upper value limit of items made is 100 gold
The upper limit refers to what a single staff is capable of, they can pool their efforts to raise this limit.