mud bricks and/or wattle and daub

This is the most basic of building technology and allows the construction of a hamlet, a settlement of less than 400 people, and the building of basic houses and basic religious and commercial buildings. This provision of shelter will also provide a Population Bonus.
Wattle and daub is a material used in building walls, which consists of interwoven sticks or twigs covered with mud or clay. Basic bricks are formed with mud or clay and dried in the sun. Either material will provide basic shelter for a civilization.