Open concept living has become one of the most requested renovation projects in Montreal. Homeowners want brighter, more connected spaces where the kitchen flows into the dining and living areas. But knocking down a wall is not as simple as it looks on TV.
Here is what you need to know before starting an open concept renovation in Montreal, from permits and structural engineering to costs and design considerations.
Do You Need a Permit?
In the City of Montreal, you need a renovation permit for any work that involves structural modifications. This includes removing or modifying load-bearing walls. The permit process typically takes 2 to 4 weeks and costs $150 to $500 depending on the borough.
You will also need a structural engineer report before any load-bearing wall removal. This is not optional. The engineer will assess the wall, design a beam and post solution, and provide stamped drawings that the contractor follows during construction. Engineering fees typically run $800 to $2,000.
Load-Bearing vs. Non-Load-Bearing Walls
This is the most critical question in any open concept project. Removing a non-load-bearing wall is straightforward and relatively inexpensive ($1,500 to $4,000 including finishing). Removing a load-bearing wall requires engineering, a steel or LVL beam, support posts, and potentially foundation reinforcement. Costs jump to $5,000 to $15,000 or more.
Never assume a wall is non-load-bearing. Even experienced contractors should verify with an engineer before cutting anything. In older Montreal homes (pre-1960), wall configurations can be unpredictable.
Average Costs for Open Concept Renovations in Montreal
| Component | Typical Cost |
|---|---|
| Non-load-bearing wall removal + finishing | $1,500 – $4,000 |
| Load-bearing wall removal (incl. beam) | $5,000 – $15,000 |
| Structural engineer report | $800 – $2,000 |
| Electrical rerouting | $1,000 – $3,000 |
| Plumbing rerouting (if applicable) | $2,000 – $5,000 |
| Flooring transition/matching | $2,000 – $6,000 |
| HVAC adjustments | $500 – $2,000 |
Design Considerations
- Flooring continuity. Matching existing flooring across the newly opened space can be tricky, especially with hardwood of different ages. Sometimes a full refinish or new flooring throughout is the cleanest solution.
- Natural light. Removing walls allows light from windows to penetrate deeper into the home. In Montreal long winters, maximizing daylight is a real quality-of-life improvement.
- Kitchen ventilation. An open kitchen means cooking smells travel everywhere. Invest in a good range hood (600+ CFM) vented to the exterior.
- Noise management. Open spaces carry sound. Consider acoustic ceiling treatments or area rugs to manage noise levels.
- Heating balance. Removing walls changes airflow patterns. Your existing heating system may need rebalancing to maintain comfort throughout the open space.
The RBQ Requirement
Any renovation involving structural modifications in Quebec requires an RBQ licensed contractor. This is the law, and it protects you with mandatory warranty coverage. Unlicensed structural work can void your home insurance and create liability issues when you sell.