When are plumbing permits not required?

Plumbing permits are typically required for most significant plumbing work to ensure that the work is done safely and meets code requirements. However, fixing a leak often falls under routine maintenance, which generally does not necessitate a permit. This is because repairs that involve minor issues, such as fixing a leak in a pipe or replacing a washer in a faucet, are not considered to change the system's overall function or capacity.

In contrast, replacing fixtures, installing pipes, or remodeling a bathroom generally involves more extensive work that could affect the plumbing system's layout, water flow, or drainage. Such changes can create safety hazards if not done correctly, thus requiring inspections and permits to ensure compliance with local codes and standards.