Before your business bids on or contracts plumbing work in Quebec, it must hold the Quebec plumbing contractor licence that covers that work. The licence lets the business offer and contract the work. It does not replace the qualification required by the person who performs it.
Start with the work you plan to sell. Then build the licence file around that scope.
Decide what plumbing work the business will contract
Write down every service you intend to quote. Use job language, not broad labels such as general plumbing.
Your list might include fixture replacement, drain work, water-service work, renovations or new construction. Do not assume that related work falls under the same licence subclass. A pipe, appliance, wall opening and electrical connection can sit in different regulatory scopes.
Separate two questions:
- Can the business offer and contract this work?
- Is the assigned person qualified to perform it?
The contractor licence answers the first question. A worker competency certificate or compulsory qualification answers the second. Any required municipal permit applies to the particular job. Enterprise registration identifies the business.
Write the planned services beside those four records. Flag any service where the answer is unclear before you advertise or quote it.
Check the Quebec plumbing contractor licence scope
Compare your planned work with the official RBQ description for subclass 15.5 (opens in a new tab). Read the listed scope rather than guessing from the subclass name.
Do not stretch an RBQ plumbing licence to cover every service involving water, drains or mechanical equipment. If the planned job contains work outside the listed scope, ask the RBQ which other subclass covers it and where that application must go.
Confirm whether the RBQ or CMMTQ handles the file
The Régie du bâtiment du Québec sets the contractor licensing framework and licence subclasses. The Corporation des maîtres mécaniciens en tuyauterie du Québec receives the plumbing contractor application and handles the qualification process for plumbing contractors.
An applicant seeking the plumbing subclass must follow the current CMMTQ application route. Plumbing contracting within the CMMTQ's field also involves compulsory membership, so check the current membership and application documents before submitting the file.
If the business also needs other construction subclasses, ask the CMMTQ and RBQ how those parts must be filed. Do not assume one plumbing application covers unrelated construction work.
Record the answer against each service on your list. That becomes the scope check used before quoting.
Register the Quebec enterprise before applying
If you will operate through a corporation or partnership, create and register that entity before applying for the contractor licence. The licence application must use the legal entity that will contract the work.
If you will operate as a sole proprietor, check the Quebec enterprise registration rules for a natural person (opens in a new tab). Register before applying when those rules require it. If registration is not required for the name and structure you chose, apply through the individual route and follow the application instructions for an applicant without an NEQ.
Where registration applies, save the legal name, business name and Quebec enterprise number, or NEQ, exactly as registered. Use the same registered name and NEQ throughout the contractor licence application, security documents, tax records, quotes and invoices.
Ask the municipality where the business operates whether it requires a municipal business licence. Keep that answer in the company file, separate from permits for individual jobs.
Choose and document the respondent
The licence application assigns qualification responsibility to a named respondent, called a répondant in Quebec material. Choose that person before assembling the supporting documents.
Check which respondent will cover each qualification area required for the application: administration, safety management on construction sites, project and site management, and execution of construction work. Record the person's legal name, position in the enterprise and assigned areas.
For each area, ask the CMMTQ whether the respondent must use its examination route or can request recognition of an accepted qualification. Get the current supporting-document list directly from the CMMTQ. Do not assume that experience, a trade certificate or a qualification from another jurisdiction will be accepted without review.
Plan for a departure as well. Set a company rule that stops new quotes when the business cannot confirm respondent coverage for the required qualification areas. Then ask the CMMTQ what must be filed before quoting resumes.
Submit the plumbing qualification and licence file
Build one application folder. Keep the enterprise record, respondent documents, requested declarations and contractor-licence security documents together.
Contractor-licence security is the financial security required by the regulator as part of the licence file. Check the current RBQ contractor-licence security requirements (opens in a new tab) for the accepted form, issuer and amount. Obtain the required document from an accepted issuer and place it in the application folder without copying an old figure or form.
Before submission, compare these fields line by line:
- enterprise legal name;
- Quebec enterprise number, where applicable;
- requested licence subclass;
- respondent name and qualification areas;
- contact and address details;
- supporting-document names.
Send the plumbing application through the current CMMTQ route. If the file includes another subclass, get written direction on where that part belongs before sending it.
When the licence is issued, read the licence record itself. Confirm the legal name and subclasses shown. Save the regulator record as issued rather than retyping it into a private certificate.
Keep worker qualifications separate from the contractor licence
Quebec plumber licence requirements do not stop at the enterprise licence. The business may hold the contractor licence while the person dispatched to the site still needs a separate worker qualification.
For a named plumber going to a job covered by Quebec's construction-industry system, ask the Commission de la construction du Québec which competency certificate the work requires. Match the worker named on the job to the current certificate record rather than relying on the business licence or a copy saved for another worker.
If the plumbing work is not being performed under the CCQ construction-industry route, check Quebec's plumber compulsory qualification requirements (opens in a new tab). Use that page to identify the certificate that applies to the work and confirm the named worker's record before assigning tomorrow's call.
Add a dispatch hold to the job. No confirmed worker record, no assignment. Record the worker's name, the document checked and the scope matched to the job.
Finish the Quebec checks before taking the job
The contractor licence is one part of the first-job file. Finish the other checks before taking bookings.
Ask the municipality about licences and permits
Contact the municipality where the work will take place. Ask whether the particular job needs a building or plumbing permit, who must obtain it and what inspections must be booked.
Write the answer on the job record. Do not tell the customer that an RBQ licence replaces a municipal permit.
Check worker coverage and site-safety duties
If the business has workers, ask the CNESST (opens in a new tab) what registration, workers' compensation coverage and occupational health and safety duties apply to the operation. Keep the response in the company file and the site documents with the job.
Do not use a contractor licence number as proof that worker coverage or site-safety records are complete. They answer different questions.
Open the required tax accounts
Check the business tax accounts with Revenu Québec before trading. Ask which Quebec tax accounts and GST/HST registrations apply to the enterprise rather than relying on a threshold remembered from another job or year.
For a federal business-number question, use the Canada Revenue Agency business number service (opens in a new tab). The CRA does not issue the Quebec contractor licence.
Put the licence check into the quote and job file
Inspect the job before pricing it. Match the requested work to the licence scope and the assigned worker's qualification before sending the quote.
Add these fields to the pre-quote check:
- work requested by the customer;
- licence subclass checked;
- assigned worker record checked;
- municipal permit decision;
- party responsible for obtaining the permit;
- included work and exclusions;
- method for approving changed work.
Check the RBQ licence-number display rules (opens in a new tab) before issuing an estimate, bid, contract or invoice. Put the required licence information on each document, and ask the CMMTQ what membership information its members must also display. Do not send the quote until those details match the issued records.
Then build the price from labour, materials, subcontracted work, overhead and markup. Use the job pricing framework to calculate the price and the quote-writing guide to record the scope, exclusions and customer approval.
If opening a wall exposes a different drain route, stop. Recheck the licence scope, worker qualification and municipal permit requirements. Price the added work and get written approval through a change order before the crew continues.
Check document dates and status against the issuing body before dispatch. A saved copy tells you what the record said when downloaded. It does not tell you whether something changed later.
Use separate documents for separate decisions
The Oak Street house example is electrical, but its document chain shows the control clearly. Quote Q-1847 was 1,105 for R. Chen at 14 Oak Street. It covered a bathroom exhaust fan and four LED downlights, and it excluded chasing because the ceiling was lined.
Extra cable and chasing became an approved 160 change order. Invoice INV-1847 was 1,265. The quote recorded the accepted scope, the change order recorded added work and the invoice billed the completed work.
On a Quebec plumbing job, the licence record, worker certificate and municipal permit decision would remain separate again. Attach all of them to the same job number. Cost tracking can sit in that file too, but it does not prove regulatory compliance.
Once the Quebec plumbing contractor licence, worker record and permit decision are confirmed, Yes Foreman can keep the quote, change order, invoice and attached job documents under the same job. After closeout, use the job-costing guide to check whether the finished work made money.