Plumbing in Canada is governed by a model code (the National Plumbing Code) that only has legal force once a province adopts it, and by a permit system that, in most provinces, sits inside the municipal building department rather than a separate safety authority. The individual plumber needs trade certification; the permit is pulled by the contractor business or, for their own home, by the homeowner, not by an individual journeyperson in their own name. The big exceptions are Saskatchewan, where the Technical Safety Authority of Saskatchewan (TSASK) issues plumbing permits province-wide, and Quebec, where the RBQ licenses plumbing contractors and the municipality issues the building permit. Always confirm who the permit authority is where you are working, because it is not the same everywhere.
Who pulls the plumbing permit
The pattern in most provinces is that plumbing lives within the building code system, not a standalone plumbing authority:
- Ontario: plumbing is governed by the Building Code Act and the municipal building department. A licensed plumbing contractor applies for and pulls the permit (in Toronto, the contractor must also hold a City of Toronto Municipal Licensing and Standards contractor licence). A homeowner may pull the permit for their own property if they sign a declaration that they will personally carry out the work. A journeyperson cannot pull a permit in their own name; they work under the contractor's or the homeowner's permit.
- British Columbia: plumbing building permits are issued by the local municipal building department under the Local Government Act and the Building Act; gas permits go to Technical Safety BC. A registered owner may do plumbing work on a single detached dwelling they occupy.
- Alberta: plumbing and gas are separate permits under the Safety Codes Act, issued by the municipality (Calgary, Edmonton) or an accredited agency or the Alberta Safety Codes Authority in non-accredited areas. Replacing fixtures or a water heater without piping changes generally needs no permit.
- Saskatchewan: TSASK issues plumbing permits province-wide. A licensed contractor submits the permit before work starts; permits cannot be transferred. A homeowner plumbing permit exists only for an existing owner-occupied dwelling not on communal water or sewer (rural and private systems).
- Quebec: municipalities issue the building permit (the RBQ does not issue building permits). The RBQ licenses all plumbing contractors and certifies plumbing inspectors. A plumbing contractor needs RBQ subclass 15.5, qualified through the CMMTQ.
Is plumber a compulsory trade?
This is the part that surprises people moving around. Plumber is compulsory in Ontario, Alberta, Saskatchewan, Nova Scotia and New Brunswick, but voluntary in British Columbia, Manitoba and Newfoundland and Labrador. In a compulsory province you must hold a Certificate of Qualification or be a registered apprentice to do the work; in a voluntary province certification is available and worth having, but an uncertified person can legally do it. The full picture is in Compulsory vs Voluntary Trades.
The plumbing code, and why the edition matters
The National Plumbing Code of Canada (NPC) 2020 is the base text in most provinces, with provincial amendments layered on:
- Alberta adopted the NPC 2020 verbatim, with no provincial amendments, from 1 April 2023, which is unusual.
- Ontario embeds NPC 2020 in the 2024 Ontario Building Code, in force 1 January 2025 (mandatory from 1 April 2025).
- British Columbia uses NPC 2020 with BC amendments in the 2024 BC Building Code, in force 8 March 2024.
- Saskatchewan uses NPC 2020 with Saskatchewan amendments.
- Quebec maintains its own Construction Code, Chapter III (Plumbing), based on NPC 2020 with Quebec amendments, in force from 11 July 2024.
A plumber moving between provinces should confirm both the code edition and whether the destination treats plumber as a compulsory trade.
The plumber-to-gas overlap
Gas fitting is a separate trade from plumbing in most provinces, so a plumbing licence does not let you connect gas appliances (see Gasfitter Licensing Across Canada). Two notable bridges: in Saskatchewan a journeyperson plumber can add a Domestic Gasfitter licence by exam, and in Quebec RBQ subclass 15.5 plumbing already includes gas supply piping, though installing and commissioning gas-fired appliances is a separate authorisation (subclass 15.2 or 15.4). Do not assume your plumbing ticket carries gas rights anywhere else.
Common mistakes
- Thinking you can pull a permit as a journeyperson. The permit lives with the contractor business or the homeowner, not the individual tradesperson.
- Assuming plumbing is always a city permit. In Saskatchewan it is TSASK; in Quebec the contractor is RBQ-licensed even though the municipality issues the building permit.
- Believing plumber is compulsory everywhere. It is voluntary in BC, Manitoba and Newfoundland and Labrador.
- Connecting gas under a plumbing ticket. Gas fitting is a separate trade; check the province.
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