Gain space without moving — an addition, a storey or an annex, well integrated.
At Construction Hibou, an extension adds the space you're missing while blending into your home, across Greater Montreal.
Expanding means tying the new to the existing: the foundation, structure, roof and cladding have to marry the house. As an RBQ-licensed general contractor, we work with engineer's plans when needed, obtain the required permits and carry out every step to code. A home extension is part of our construction services.
Extension job sites led by our team.
Adding space, without it looking added on — here's everything we take on.
Adding a room or a wing at ground level, with foundation and a tie-in to the home.
Raising or adding a storey, with reinforcement of the existing structure when needed.
Building an annex, a garage or an attached space, integrated into your property.
Foundation, supports and framing built to the plans and to the Building Code.
Roof, cladding, insulation and systems tied cleanly into the current house.
From the first meeting to handover — organized and transparent.
We assess your project and give you a clear, detailed quote.
Project planning, budget planning and scheduling — with you.
Our team delivers the work properly and on time.
Final walkthrough with you, clean site, impeccable result.
On an extension, the foundation and the tie-in to the existing home carry the most weight. Here's what moves the budget:
• The type of extension — a ground-floor addition, a storey addition and an annex aren't the same scale.
• Foundation and structure — foundation work and reinforcing the structure weigh on the budget.
• The tie-in to the existing home — marrying the roof, cladding and systems to the house takes work.
• Materials and finishes — from structure to finishes, the choice of materials moves the price.
• Permits and engineering — engineer's plans and permits are part of an extension's costs.
Every project is quoted after a free consultation.
Engineer's plans, permits and weather dictate an extension's calendar. Here's what affects the timeline:
• The scope of the project — a small addition finishes faster than a full storey addition.
• Permits and engineering — plans and municipal timelines are part of the schedule.
• The weather — foundation, framing and envelope work depend on the weather.
• Material lead times — framing, windows and exterior materials have a supply lead time.
We set a realistic schedule at the design stage and keep you informed at every step through to handover.
Yes, in most cases. An extension affects the structure, so it usually requires plans and a permit, often with an engineer's input. As an RBQ-licensed contractor, we coordinate the plans, permits and inspections.
Yes, that's the goal. We tie the foundation, roof, cladding and systems into the existing home so the extension blends in, inside and out.
Often yes, since much of an extension is built outside the lived-in volume. We protect the work zone and only open into the home at the tie-in stage.
Yes. We build storey additions and raises, with the reinforcement of the existing structure required to carry the new volume.
We build extensions in Montreal, Laval, the North Shore and the South Shore, across Greater Montreal.
Construction Hibou builds home extensions across Greater Montreal. We build extensions in Montreal, Laval, the North Shore and the South Shore. Home extensions are part of our construction services, alongside new construction.
Tell us how much space you want to gain, and where.