A Lumber Hut is a building that produces 1 population to the city its built in. It can only be placed on forest tiles, and it can only be placed after Forestry is researched. Each Lumber Hut costs 2 stars.

The Sawmill, which is unlocked after researching Mathematics, produces 1 extra population to the city which it is built in for every adjacent lumber hut, even if the lumber hut is in another one of your cities' territories.