September 23, 2026
Planning Plumbing for Your Accessory Dwelling Unit
Building & Utilities
Accessory dwelling unit plumbing involves a coordinated system of components designed to deliver water and manage wastewater effectively within a compact living space. This system includes water supply lines, fixtures like sinks and toilets, drainage pipes, venting, and connections to either municipal sewer systems or on-site wastewater solutions, all arranged to optimize flow and function in a smaller footprint. The plumbing system separates clean water supply from wastewater removal, with wate