What bathroom work requires a professional?

Most bathroom renovation work requires a licensed professional, and for good reason — bathrooms combine water, electricity, and structural elements in a small space where mistakes can be costly and dangerous.

Plumbing work is one of the clearest cases. Moving or adding drains, supply lines, or venting must be done by a licensed plumber in Ontario. This includes adding a new bathroom, relocating a toilet or shower drain, or roughing in a basement bathroom. Improper plumbing leads to leaks, water damage, and failed inspections — and unpermitted work can create serious problems when you sell your home.

Electrical work in bathrooms is strictly regulated under the Ontario Electrical Safety Code. Any new circuits, GFCI outlet installation, exhaust fan wiring, or lighting changes must be done by a licensed electrician and typically require an ESA permit and inspection. Bathrooms are high-risk environments for electrical hazards, so this is non-negotiable.

Structural modifications — like removing walls, moving doorways, or altering floor joists to accommodate a new drain — require both a licensed contractor and a building permit from the City of Ottawa. Your contractor handles the permit application process.

Waterproofing and tile work is another area where professional execution matters enormously. A shower that isn't properly waterproofed behind the tile can cause hidden water damage for years before it becomes visible. Licensed tile installers know how to properly apply membranes, slope shower floors, and seal penetrations correctly.

What homeowners can reasonably DIY is limited to cosmetic updates: swapping a showerhead, replacing a toilet seat, painting, or installing simple accessories like towel bars. Anything involving opening walls, moving fixtures, or touching wiring or drain lines should go to a licensed professional.

In Ottawa, bathroom renovations involving plumbing, electrical, or structural changes require permits — and licensed contractors are set up to pull those permits on your behalf. Working without permits puts your home insurance and resale value at risk.

For a free estimate on your bathroom renovation project, reach out to Ottawa Bathrooms — we handle everything from permits to finishing touches.