Plumbers in Greater Montréal

Plumbers in Greater Montréal at a glance

As of November 3, 2026, 1,006 companies in Greater Montréal hold an active RBQ licence for this trade, 44% of the 2,269 companies in Quebec. It is trade number 6 of 15 by number of companies in the region.

A plumber handles the piping of a home or a business: a leak under the sink, a water heater to replace, a bathroom redone, a blocked drain stack, a backwater valve in the basement. In Quebec this work requires subcategory 15.5 of the RBQ licence, issued to members of the Corporation des maîtres mécaniciens en tuyauterie (CMMTQ). In the plexes of central Montréal, old water service lines and cast-iron drains often show up in quotes.

Where the companies are

Breakdown: the Island of Montréal 351, Laval 157, the South Shore 263 and the North Shore 235. On the island, Rivière-des-Prairies–Pointe-aux-Trembles has the most (51), ahead of West Island (32), Saint-Laurent (30), Saint-Léonard (28) and Ahuntsic-Cartierville (22). Outside the City of Montréal: Laval (157), Longueuil (53), Terrebonne (49), Repentigny (34), Mascouche (27), Mirabel (25), Boisbriand (16) and Châteauguay (16).

On the Island of Montréal, 145 of the 351 companies in this trade (41%) have held their licence for 10 years or more, the oldest since 1983; 14 got theirs in the last 90 days. Many also work in other trades: heating and cooling (155), renovation (118) and electrical (37). 351 show a phone number, 341 of them in 514 or 438.

Before you hire: plumbers

Plumbing work must be done by a contractor holding subcategory 15.5. Most of these licences are issued by the Corporation des maîtres mécaniciens en tuyauterie du Québec (CMMTQ).

In an emergency (water damage, sewer backup), shut off the main water valve and call a company from the list directly. For planned work, say in your request roughly how old the plumbing is, which floor, how the basement is reached, and whether the borough or city requires a permit.

Licence subcategories for this trade: 15.5 Plumbing.

See also

• How it works
• RBQ licence check: how to verify a Quebec contractor
• Water leak at home: what to do right away
• Frozen pipes: what to do and how to prevent them
• Bathroom renovation in Montréal: trades, licences, permits
• Water heater replacement: when and who installs it
• Kitchen renovation in Montréal: steps, permits, contractors
• Oil furnace replacement in Quebec: what the rules allow
• Basement renovation in Montréal: permits and valves
• Water damage insurance claim: step by step
• Lead pipes and drinking water: check your service line
• Hiring a plumber in Montréal: RBQ licence and CMMTQ