Quebec Just Pushed the Construction Code Deadline to 2027 — What It Means for Your Renovation

On August 26, regulations amending the Electricity and Building chapters of the Code de construction — and the Building chapter of the Code de sécurité — were published in the Gazette officielle du Québec. They take effect September 10, 2026, and they do one thing: they extend the transition period by a year. Work that begins before October 17, 2027 can still be built to the previous editions of those chapters. If you are planning a renovation this fall, this is the regulatory change most likely to touch your project — and the one most likely to be misread.

What actually changed

Two chapters are involved. The current Chapitre I, Bâtiment — built on the National Building Code of Canada 2020 as modified for Quebec — came into force on April 17, 2025. The current Chapitre V, Électricité — built on the Canadian Electrical Code 2021 as modified for Quebec — came into force on March 26, 2026. Each arrived with a transition period during which the previous edition could still be applied. The Bâtiment window was set to close on October 17, 2026, roughly seven weeks from now. The Électricité window was set to close on September 26, 2026, sooner still. Both now run to October 17, 2027.

This is a reprieve, not a repeal

The distinction matters, because it is the part that gets lost in summary. The newer editions are in force and have been for months. What the extension preserves is the option of applying the previous editions, and only to work that has actually begun before the deadline. The APCHQ makes the same point plainly in its own note on the extension: this does not postpone the coming into force of the 2020 code. Municipal bylaws remain binding, and some municipalities already require the newer edition regardless of what the provincial transition allows.

Whose rulebook applies to a house in Laval or Montreal

Here is the piece most homeowners have never been told. For a typical single-family home or small plex, the provincial chapter is not the operative document at all. Chapitre I, Bâtiment does not apply to residential buildings of fewer than three storeys and fewer than nine dwelling units. Those buildings fall to the municipality, which adopts its own construction bylaw — commonly by referencing the provincial code, sometimes with its own additions, and on its own timetable.

So the practical question is not only "which edition does the province still allow" but "which edition has my city adopted, and as of when." Those two answers can differ, and the one that governs your permit is the municipal one. It is a question worth asking before the design is finalized rather than after the plans go in — a requirement discovered at permit review is a redraw, and in a market where review already runs weeks, a redraw is the expensive kind of delay.

What the newer editions actually ask for

An extension only matters where the two editions differ, so it is worth knowing where they do. On the building side, the RBQ's own material on the Quebec-modified 2020 code points to revised thermal envelope requirements, changes affecting stairs, new obligations around soil gas and radon, "smart" vapour barriers, and revised accessibility dimensions including universal washrooms. On the electrical side, the RBQ lists provisions for electric-vehicle charging infrastructure in residential buildings, a requirement to declare planned EV charging loads in the work declaration, a revised Section 10 on grounding, mandatory re-evaluation of electrical equipment exposed to water infiltration, receptacle requirements in spaces where children may be present, and a ban on selling unapproved electrical equipment.

Read that list as a homeowner rather than as a contractor and a pattern shows up: the items you are most likely to actually meet are the electrical ones and the envelope ones. A kitchen renovation that rewires a wall, a panel upgraded to carry an induction range or a future charger, a basement being insulated and finished — those are the projects where the edition in use stops being paperwork and starts being what is inside your walls.

Soil-gas and radon provisions are one of the sharpest differences between the editions, and a finished basement is where a homeowner is most likely to run into them. Finishing a basement: permits, moisture and radon

What to do if you're renovating in the next year

• Ask which edition your project is being designed and built to, and get the answer in writing. For the next year, two contractors quoting the same job can legally be working to different editions — and their prices will reflect that.
• Confirm with your borough or city, not just the province. The municipal bylaw is what your permit is issued under, and it can be stricter than the provincial transition.
• Where the difference is small, choose the newer edition anyway. Envelope, grounding and EV-ready provisions are the ones a buyer's inspector will eventually ask about.
• Don't read "transition extended" as "nothing changed." Licensing, permits and the codes themselves all still apply, and the RBQ licence requirement is unaffected by any of this.
• Keep the paperwork: the permit, the edition applied, and the electrical work declaration. It matters at resale and it matters at claim time.

For most homeowners this extension is quietly good news — it removes a deadline that would have landed in the middle of this autumn's projects, and it buys the industry a year to catch up on training and product supply. It is not permission to stop asking questions. If anything, a year in which two editions are simultaneously legal is exactly the year to be specific about which one you are getting.

Renovision AnA plans and builds kitchen, bathroom and basement renovations across Laval and Montreal, and we handle the permit and code questions as part of the job rather than leaving them with you. Get a rough estimate in minutes

Sources: Régie du bâtiment du Québec, "Prolongation de la période transitoire en bâtiment et en électricité" (July 7 and August 26, 2026) and its Modifications réglementaires page for the Électricité chapter; APCHQ, "Prolongation de la période transitoire du Code de construction" and "Application du code de construction du Québec." Regulations and municipal bylaws change — confirm the requirements that apply to your own project with the RBQ and with your municipality before you start.