Building permits for kitchens and bathrooms in Kitchener, Waterloo and Cambridge

The good news first: most kitchen renovations in Waterloo Region need no building permit. New cabinets, countertops, tile and paint are finish work, and replacing a sink or toilet in the same spot is not a permit job in any of the three cities. Permits come in when the work changes the house itself: plumbing that moves, walls that carry load, openings that get wider, basements that become living space. This guide goes job by job, city by city. The summary is on our homepage under permits.

Every rule below comes from the cities’ own pages, checked on 23 October 2026. Each city says its list is not complete, so when in doubt, ask the building department before you start.

Job by job

The cities’ own pages: Kitchener, Waterloo and Cambridge.

The difference in Waterloo

Waterloo’s list includes interior demolition. In practice that means a kitchen or bathroom stripped back to the studs usually needs a permit in Waterloo even when nothing moves, where the same job in Kitchener might not. If you live in Waterloo and the plan involves taking walls back to the framing, assume a permit and plan the time for it.

Electrical work is its own system

Electrical work is not part of the City building permit anywhere in Ontario. The City of Kitchener says plainly that it does not review or inspect electrical work. Instead:

• In Ontario, anyone you hire to do electrical work in your home must be a Licensed Electrical Contractor.
• The contractor files a notification of work with the Electrical Safety Authority before starting, even for something as simple as new pot lights.
• The work is inspected before it is covered up, and once it passes, ESA issues a Certificate of Acceptance, which your insurer may ask for.
• You can check a contractor’s ECRA/ESA licence number with the ESA contractor lookup.

Gas work (moving a gas range, adding a line to an island) needs a TSSA-certified gas technician.

How long the City takes

Ontario’s Building Code gives a building department 10 days, not counting weekends or holidays, to issue or refuse a permit for a house once the application is complete. Kitchener says it reviews a complete residential application within 10 business days; Waterloo processes house renovations in 10 business days and secondary units in 15. The clock starts only when every document is in and the fees are paid, so an incomplete application is the most common cause of delay.

What a permit costs

Kitchener lists interior alterations at $0.37 per square foot with a $95 minimum, plus a $250 fee that is refunded when the final inspection is approved. Waterloo lists a residential renovation with interior demolition at $0.62 per square foot, a finished basement at a flat $351, and $392 for each new dwelling unit (all checked in October 2026). Cambridge’s page states no fee schedule for these jobs; ask the City.

What the application needs

Expect to provide drawings of the existing and proposed layout. Kitchener’s list for interior alterations includes the kitchen or bathroom layout. Structural changes need details of the new beam or column, which often means an engineer. For a basement unit, the drawings show exits, fire separations, room sizes and the services.

Who applies, and inspections

The owner, or an agent acting for the owner such as the contractor, can apply. The written contract should say who does. Once the permit is issued, the City inspects at set stages, typically before walls are closed and at the end, and nothing should be covered until each inspection passes.

Why it is worth doing properly

Work that needed a permit and did not get one can cause trouble later: an insurer asking questions after a claim, a buyer’s inspector asking for permits that were never issued, or work that has to be opened up to be inspected. The permit fee is small next to any of those.

Condos and townhouses

In a condominium, the City permit is only half the approval. Your building’s declaration and rules decide what you may change inside the unit, and most boards or property managers want a written description of the work, the contractor’s insurance certificate and the schedule before anything starts. If the plumbing moves, the City permit still applies on top of the building’s approval. Condo kitchens usually keep the sink on its existing wall because the drains connect to the building’s stack, which is one reason most condo renovations need no building permit at all. Our condo kitchen guide covers the building’s side.

How we handle it

At the measure we flag whether your project needs a building permit, an ESA notification, or both, and the written scope names who applies. Read more about kitchen renovation in Kitchener, our bathroom renovations and basement renovations and legal units, or ask for a written quote.

Questions