How to start a plumbing business in Quebec
Plumbing is an essential trade, in high demand and well paid — but also one of the most regulated in Quebec. To start a plumbing business, knowing how to do the work isn't enough: you need a licence, membership in a professional corporation and several authorizations. Here's the complete path, in order, and how to attract your first clients.
In plumbing, you can't improvise: the law governs both the worker's competency and the business's licence. Understanding these two levels is essential before you start. Let's first see how to become a qualified plumber, then how to turn that qualification into a legal business.
Becoming a qualified plumber before becoming a contractor
The starting point is professional competency. You become a plumber by completing recognized training — generally a vocational diploma (DEP) in plumbing and heating — then accumulating supervised apprenticeship hours. On sites covered by Act R-20, the worker holds a competency certificate from the Commission de la construction du Québec (CCQ), first as an apprentice, then as a journeyman once their apprenticeship periods are complete.
This step isn't just a legal requirement: it builds the expertise that will make your future business's reputation. Plumbing requires precise knowledge of codes, standards and techniques. Mastering the trade is the foundation everything else rests on.
The double requirement: CMMTQ licence + CMMTQ membership
Subcategory 15.5
To perform plumbing work for others, your business must hold a contractor licence including, notably, subcategory 15.5, Plumbing contractor. It's this subcategory that officially authorizes you to work on water-supply, drainage and venting systems for sanitary appliances.
Mandatory CMMTQ membership
A major particularity of the trade: every plumbing and heating contractor must be a member of the Corporation des maîtres mécaniciens en tuyauterie du Québec (CMMTQ). As a government mandatary, the CMMTQ ensures the professional qualification of plumbing contractors and issues the licence for this field. In other words, it prepares and administers the exams and decides whether to issue your licence. Membership and the licence renew each year.
The designated officer, the exams and bonding
As with any contractor licence, your business must have a designated officer: a person who has demonstrated their knowledge of construction-business management and the execution of plumbing work, by passing the exams administered by the CMMTQ. A licence bond is also required, and mandatory continuing education applies to members.
The designated officer must be genuinely involved in managing the business. Acting as a “front-man” — being paid to appear as the officer without taking part in operations — is an offence subject to fines, for both the person and the business. The qualification must be genuine.
The combination of a CMMTQ-issued licence (subcategory 15.5) + CMMTQ membership + qualified designated officer + bonding can't be bypassed. It's demanding, but it's also what protects your reputation and keeps out unqualified competition.
Your obligations once in business
- Register the business with the Registraire des entreprises (NEQ).
- Display your licence number (the CMMTQ logo on the vehicle is a sign of trust).
- Register with the CNESST if you have employees.
- Register for taxes (GST and QST) from $30,000 in revenue.
- Declare your work to the RBQ per the requirements in force.
- Comply with the Construction Code (Plumbing chapter) and standards, including backflow-prevention devices.
The steps to launch your plumbing business
- Obtain your qualification (DEP, apprenticeship, journeyman competency certificate).
- Prepare your designated officer for the CMMTQ exams.
- File your licence application (subcategory 15.5) and join the CMMTQ.
- Provide the required bond and liability insurance.
- Register the business (NEQ) and register for taxes as needed.
- Register with the CNESST if you hire.
- Build your online presence to capture local requests.
Finding clients: local visibility is queen
Plumbing lives largely on emergency and proximity. When damage occurs, the client immediately searches “plumber + their city” or “emergency plumber near me” and calls the first one that inspires trust. Being visible at that exact moment, with good reviews, makes all the difference between landing the call or leaving it to a competitor.
That's precisely the kind of business we grow at Ton Consultant: an optimized Google listing, a flow of reviews and a site ranking for your services and your region to capture these high-intent searches. A plumber people find first, and who reassures, never runs out of work.
The legal steps launch your business; it's visibility that keeps it alive. When your future clients search for your service on Google, that's where everything is decided. We're an agency 100 % focused on SEO: we help you show up at the right moment, in front of the right people, in your region.