Poly B replacement permits in Montreal
What Montreal actually publishes about permitting a residential repipe, verified August 6, 2026.
Is a permit required?
Not from the city, for a pure repipe: since 2001 interior plumbing falls under RBQ jurisdiction and Montreal boroughs no longer issue plumbing permits for it. A borough renovation permit enters only if the work opens walls or changes room layouts, and the buried water service line has its own borough cutting-permit regime. The rule is consistent citywide, but with 19 boroughs issuing their own permits, confirm with yours.
Who can pull the permit
A hired contractor needs an RBQ plumbing licence and CMMTQ membership. A homeowner may do their own plumbing in a single-family home they occupy, and either way the work is declared to the RBQ.
Inspections
Interior plumbing oversight runs through the RBQ declaration regime rather than municipal inspection. Borough inspections apply only where a renovation permit is triggered.
Fees
Where a borough renovation permit applies, roughly $9.80 per $1,000 of work with a residential minimum around $167. The RBQ declaration carries per-fixture fees on its own schedule.
Timelines
Around 14 days for first contact on borough permits, varying by borough and season.
Who administers it
Régie du bâtiment du Québec for the plumbing itself; your borough's permit counter for renovation permits; Service de l'eau for service line work.
What Montreal doesn’t publish
In keeping with this site’s rule of never guessing, these details were not verifiable from Montreal’s published materials and should be confirmed directly with the municipality:
- ?Borough-by-borough variations (19 boroughs, spot-checked not exhaustively).
- ?RBQ per-fixture declaration fee amounts.
How this fits the bigger job
The permit and inspection record is part of the documentation package your insurer will want after a repipe, alongside the completion certificate. The insurance chapter covers that package, and the cost guide covers what the whole job runs. The Montreal city profile shows how much of the local housing stock sits in the Poly B era.
Sources for this page
- Montreal borough Info-Permis guidance and renovation permit pages
- RBQ plumbing obligations and declaration-of-work pages
Verified against Montreal’s published municipal materials on August 6, 2026. Rules and fees change without notice; confirm with the municipality before starting work. This page is not legal or code advice.
Published by Poly B Plumbing Guys
This library is maintained by the team that replaces Poly B every day across Alberta and BC. Red Seal certified plumbers, full remove-replace-restore service including drywall and paint, a 25-year warranty, and the completion certificate insurers ask for.
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