Composting toilets are regulated and require a permit.

Composting toilets, which are designed to treat human waste through aerobic decomposition, do not universally require a permit. The regulation of composting toilets varies significantly based on local, state, and national health and environmental codes. In many areas, these toilets can be used without needing a formal permit, especially when they are installed in situations where traditional plumbing and septic systems are not feasible. Additionally, composting toilets are often promoted as eco-friendly alternatives and can sometimes be implemented as part of sustainable living practices. However, there are jurisdictions where certain types of composting systems may require a permit, particularly when they are part of larger waste management systems or when used in commercial applications.

Different regulations often focus on ensuring that the installation and operation of these toilets comply with public health standards, which may mean that for certain configurations or installations, a permit is required. In summary, while some situations may necessitate a permit, the general statement that all composting toilets require one is not accurate.