Do I Need a Building Permit to Renovate? Rules by Province

Renovations that replace finishes need no building permit, and renovations that move a wall, a pipe, a window or the outside of the house almost always do. The line sits in much the same place in Ontario, BC and Alberta, but the law, the trade permits and the fees differ. Near that line, your city's own list decides, and the owner answers for the permit even when a contractor says none is needed.

Which renovations need a building permit

The broad test is the same in the cities below: replacing a finish needs no permit, while changing the structure, layout, plumbing, heating, outside openings or size of the house needs a building permit, a trade permit or both.

Kitchen and bathroom renovations

A kitchen that keeps its layout needs no building permit: Toronto's permit list exempts cabinetry and millwork, and Vancouver exempts replacing fixtures, cabinets and flooring. Permits arrive with the first change behind the walls, such as moving the sink, adding a gas line, opening a wall or running new circuits.

Bathrooms follow the same line. A toilet, tub or vanity replaced where it stands needs no building permit in Toronto, while moving a drain or adding a shower changes the plumbing system and does.

Walls and structure

Toronto needs a permit for adding or removing walls, which it describes as changing room sizes or uses, Vancouver for moving interior walls and partitions, and Calgary for moving or removing walls on any floor of the house. Taking out a load-bearing wall adds engineering: Edmonton requires engineer-stamped drawings for it.

Basements, suites and additions

Finishing a basement needs a permit in Ottawa, and basement development needs one in Calgary and Edmonton; Toronto asks for one once the work adds walls or plumbing or creates a second unit. A basement with its own kitchen and bathroom has to apply as a secondary suite in Calgary, and a suite brings fire separation and exit rules that a family basement does not have to meet. Toronto also lists basement underpinning and a new basement entrance as permit work.

Every addition needs at least a building permit in Calgary, Toronto lists second-storey additions by name, and Vancouver's list includes any renovation that creates new area. Edmonton's 2026 fees add a $415 development permit to the building permit for an addition that adds floor area.

Building permit rules in Ontario, BC and Alberta

Who issues the permit differs by province, and so do the statute behind the duty to get one and the code in force. Electrical work takes its own permit in all three, and in Ontario it comes from the Electrical Safety Authority rather than the city.

Ontario

Ontario's Building Code Act defines construct to include the material alteration or repair of a building, and a building as a structure over 10 m², or one of any size that contains plumbing. Zoning applies even where no permit does: Toronto reminds owners that work exempt from a building permit still has to comply with the zoning bylaw.

British Columbia

BC's provincial guidance asks for the required permits before any stage of a project begins. Vancouver's permit list covers moving interior walls or plumbing, electrical or gas lines, structural repairs, a secondary suite and building or altering a garage, shed or deck.

Alberta

Under Alberta's safety codes system, primary responsibility for compliance rests with the owner of the building. Calgary and Edmonton add a development permit, which checks a project against the land use or zoning bylaw. Calgary asks for one only when the design or location breaks the land use bylaw, and Edmonton's 2026 fee schedule skips it for interior alterations unless the space is for a business or a secondary suite.

Electrical, plumbing and gas permits are separate

The building permit covers structure and layout, and the trades carry their own permits. An Ontario homeowner may do their own electrical work after filing a notification of work with the Electrical Safety Authority, even for a small job, but friends, family members or neighbours may not do it for them. Calgary wants an electrical permit for all electrical work and a plumbing permit for all new plumbing, and Edmonton separate permits for heating and ventilation, plumbing, gas and electrical work.

Homeowner trade permits come with conditions. Calgary issues them only to owners who live in the home or intend to and who do the work themselves, never for the main electrical service or in apartment-style condos, and Edmonton only to owners who live in a house that shares no wall with a neighbour. Technical Safety BC refuses them to owners of a strata unit or a non-strata duplex and to anyone running a business from the home.

Condos, strata units and older houses

A condo or strata unit can need a second approval, from its own board. BC's standard strata bylaws require the strata corporation's written approval before an owner alters the structure, the exterior, exterior doors and windows or common property inside the unit. Ontario's Condominium Act allows a change to the common elements only after the board approves it by resolution and the owner and the corporation have an agreement on cost, repair and insurance.

Older houses add an asbestos step to the application: in BC a local government may ask for an asbestos clearance letter before it issues the permit, and Calgary asks for an asbestos form with applications for houses built before 1990.

Who applies for the permit

The owner, or someone acting for the owner, applies. Ontario tells homeowners that getting building permits is their responsibility, and that a contractor who takes them out should say so in the renovation contract, with no work starting until the owner has seen them. Calgary's application asks whether the homeowner or a representative is applying, so a contractor can file it, with the owner still primarily responsible for compliance.

Running the job yourself makes you the one hiring. In BC, a homeowner who hires someone not in business for a one-time job must register with WorkSafeBC once the work reaches 24 hours, counted across all workers.

A new house adds licence and warranty checks. In BC, the home must be registered with BC Housing, with proof of the builder's licence and home warranty insurance or an exemption, before the building permit is issued, and in Ontario a builder of a custom home on the owner's land must be licensed by the HCRA.

How long a permit takes and what it costs

Cities publish review targets for complete applications, and an incomplete one waits: Toronto states there is no time frame for reviewing an incomplete application.

Fees run by floor area in Toronto, by the value of the work in Ottawa and Edmonton, and flat by type of renovation in Calgary: Ottawa's comes to $765 on $60,000 of work.

Inspections and closing the permit

A permit comes with inspections at set stages, and each has to pass before the work it checks is covered, so the stages set the order of work. Toronto's, for a house:

1. Footings before the concrete is poured, and foundations when complete
2. Structural framing, with the plumbing and HVAC rough-ins in place
3. Plumbing rough-in, ready for testing
4. Insulation and vapour barrier, when complete
5. Fire separations, before interior finishes go on
6. Plumbing, once the fixtures are installed
7. Final interior and final exterior

Toronto takes inspection bookings up to four weeks ahead, and anything covered before it passes has to be uncovered. The owner books the final inspection, which closes the permit. It is also the natural point for the last payment, though the 10% holdback the lien acts require in Ontario, BC and Alberta stays back for the period each act sets.

What happens if you renovate without a permit

Skipping a permit moves the cost to later. Ontario's Building Code Act allows fines of up to $50,000 for a person's first offence and $100,000 for a later one. Edmonton warns of stop-work orders, fines and administrative penalties, and Vancouver of removal of the work and legal or financial issues when the house is sold or an insurance claim is filed.

Hidden work is the expensive part, because covered work an inspector has not seen can be ordered opened, and the Electrical Safety Authority calls its Certificate of Acceptance an important document for insurance and resale. A suite built without a permit also fails the federal multigenerational home renovation credit, which requires the unit to meet local permits, codes and bylaws.