Plumbing Permits in Vaughan: The Basics

Jobs that usually need a permit

• Adding new fixtures where there were none, such as a basement bathroom.
• Moving drains or adding new drain and vent piping.
• Fitting a backwater valve on the main drain.
• Replacing or repairing a building sewer or the water service.
• Creating a second suite.

Jobs that usually do not

• Replacing a faucet, toilet or basin in its existing location.
• Clearing a drain.
• Repairing a leak in existing pipe.
• Changing out a water heater for the same type, though gas appliance work has its own TSSA rules.

This is general guidance. The City of Vaughan's Building Standards department decides what needs a permit, and the Ontario Building Code sets the technical rules. Check with the City for your project.

How it works

An application is submitted with drawings showing the plumbing layout. Once issued, work proceeds, and inspections happen at set stages, usually before underground or concealed work is covered. The inspector checks pipe sizes, slopes, venting, and testing. A final inspection closes the permit.

Why permits matter

Unpermitted work can complicate insurance claims and sales. Buyers' lawyers and inspectors may ask for permit records, especially for basement apartments and added bathrooms. Permits also mean someone independent checked the work.

See basement bathroom rough-ins and backwater valves.