While a prefab homes is basically home or a cottage (that is made differently), we thought it deserved its own category because of their growing popularity.
Prefab homes are generally made in a controlled environment (off-site) and then delivered and installed on-site. Building like this offers many advantages. It is generally less expensive to build this way and does less damage to the environment.
Prefab homes are very often modern in style. A modern home needs a modern, sustainable sanitation system. That is where a composting toilet comes in.