Workbench
The first crafting station: it crafts and repairs basic tools, weapons and armor, and lets you build within 20 m (+4 m per upgrade). Crafting at it needs a roof, and its area also stops monsters from spawning. Costs 10 Wood, needs no other station, and reaches level 5 with its four upgrades placed within 5 m.
Recipe
How to upgrade it · 4
Each upgrade is built next to the station and raises it one level. Level 1 is the station on its own.