Basement Renovation — Turn Your Unused Square Footage into Real Living Space

A well-renovated basement easily adds 30 to 40% more livable square footage to your home. A family room, a home office, an extra bedroom, a space for the teens, or a combination of it all. No moving, no costly addition, no expenses of a bigger house.

At Deluxe Group, We've been renovating residential basements for over 15 years. We know what's hiding behind those walls, and we know how to turn a dark, underused space into somewhere you'll actually want to spend time.

What a complete basement renovation includes

Every project is different depending on the starting condition, the layout, and what you want to get out of it. But here's what we typically cover in a residential basement renovation:

Preparation and structure:

• Moisture and water infiltration assessment before we start anything
• Treatment or drainage if moisture issues are detected
• Wall and floor insulation to energy efficiency standards
• Metal or wood framing for walls and partitions

Electrical and mechanical:

• Adding electrical points, outlets, and lighting according to the plan
• Coordination with existing systems — heating, ventilation, plumbing — if a bathroom or laundry nook is included

Interior finishes:

• Drywall installation, taping, and mudding
• Painting — walls, ceiling, trim
• Flooring installation — ceramic, laminate, luxury vinyl, depending on your choice
• Drop ceiling or drywall, depending on available height and preferences
• Interior doors, trim, and finishing touches

We manage the project from start to finish — no juggling multiple subcontractors on your end. Our in-house team handles it all.

Basement moisture — the issue to tackle first

This is the first thing we address in every basement evaluation. And for good reason.

Renovating a damp basement without fixing the moisture problem at the source is a costly mistake. Within months, mold sets in behind the drywall, the flooring swells, materials deteriorate. You end up tearing out what was just done and paying twice.

Before we lay the first board or hang the first sheet of drywall, we assess:

• Active water infiltration or signs of past leaks
• The condition of the foundation drain and perimeter drainage system
• The relative humidity level of the space
• The existing basement ventilation

If we identify a moisture problem, we talk to you about it before any finishing work begins. Solutions can be put in place — interior waterproofing, drainage, improved ventilation, depending on the nature and source of the issue. It's not always complicated or expensive, but it's non-negotiable to guarantee the longevity of your renovation.

The possibilities for your renovated basement

A basement can become so many things. What matters is that the space is designed around how you'll actually use it.

Family room or entertainment space The most common use — and often the most transformative. A cozy space with good lighting, warm flooring, and a beautiful finish. Families with kids gain extra living space that genuinely changes day-to-day life.

Home office In recent years, the need for a workspace separate from the rest of the house has become real for many homeowners. A well soundproofed basement with good artificial lighting and well-placed outlets makes a functional, quiet office.

Extra bedroom For growing families or hosting loved ones. Basement bedrooms require special attention to insulation, ventilation, and compliance with Building Code requirements — egress windows, minimum ceiling height, and so on. We know these requirements and build them in from the design stage.

Teen suite or independent space A sitting area, a bathroom, a bedroom — many parents set up the basement as a semi-independent space for teens or a family member living with them. It's a layout we've done many times, and it plans out well from the start.

Home gym or multi-purpose space Luxury vinyl flooring, well-finished walls, good lighting — a home gym that actually looks the part and makes you want to use it.

Why choose Groupe Deluxe for your basement renovation

Hands-on residential renovation experience, project after project

We've renovated dozens of basements in every type of home — bungalows, two-storey houses, semi-detached homes. Each project brings its own quirks. Ceiling height, electrical panel location, structural columns, existing windows — we know how to work around these constraints to get the best possible result.

An in-house team from start to finish

No multiple subcontractors to coordinate, no strangers coming and going through your home. Our team handles the entire project—framing, basic electrical, insulation, drywall, painting, flooring, finishes. You get a single point of contact and a cohesive team.

Full transparency on what we find

If we open up a wall and discover something unexpected—and in older homes, it happens—we tell you right away. We don't hide anything, and we don't move forward without your approval. That's how we work.

Winter projects planned and delivered on time

Basement renovation is our winter specialty. While exterior work slows down, our team is fully available for interior projects. It's often the best time to plan this type of work—shorter timelines, greater availability.

Free estimate and a clear plan before we start

We visit your basement, assess the current condition, and talk through your vision. You receive a detailed estimate before committing—what will be done, how, and what it costs.

How your basement renovation project unfolds

Step 1 — Free visit and assessment We inspect the space—concrete condition, moisture, existing electrical, ceiling height, overall layout. We discuss what you want to do with it and take all the necessary measurements.

Step 2 — Estimate and planning You receive a detailed estimate with the steps, materials, and total cost. Together, we set a realistic timeline—start date, estimated duration, key milestones.

Step 3 — Execution and delivery Our team manages the job site from A to Z. You're updated at every significant stage. At the end, we do a full walkthrough with you to make sure everything matches what was agreed upon. Clean job site, transformed basement.

Frequently asked questions—Basement renovation

How much does a basement renovation cost in Quebec? 

For a standard residential basement—framing, insulation, drywall, paint, flooring, and basic electrical—prices typically range between $25,000 and $60,000, depending on square footage, layout complexity, and materials chosen. A basement with a bathroom, kitchen, or high-end finishes will fall in a higher range. Only an on-site visit can give you an exact figure.

How long does a complete basement renovation take? 

For a standard residential basement, the work typically takes 4 to 10 weeks, depending on square footage, project complexity, and any plumbing or electrical work involved. We set a realistic timeline from the estimate —no false promises on deadlines.

Do I need to deal with moisture issues before renovating? 

Absolutely—it's non-negotiable. Renovating over an unresolved moisture problem inevitably leads to mold, material damage, and a renovation that needs to be redone within a few years. We systematically assess moisture before starting anything.

Do I need a permit to renovate my basement? 

In most Quebec municipalities, significant work—framing, electrical, plumbing—requires a renovation permit. We recommend checking with your municipality. We can guide you through the process if needed. interior renovation Can I add a bathroom in the basement?.

Yes, it's doable in the vast majority of cases. It involves plumbing work—connecting to existing drains, sometimes installing a pressure-assisted ejection system if the drain is above floor level. It's an addition that significantly increases the value of the renovation and the property. 

Does a basement renovation increase my home's value?.

Yes, noticeably. A quality finished basement adds livable square footage to your property's resale value. According to current estimates in the Quebec real estate market, a well-executed basement renovation can generate a return on investment of 60% to 75% at resale—on top of the immediate benefit of extra living space. 

Has your basement been sleeping for too long?.

Request your free estimate—we'll come assess the space and show you what it can become.

Groupe Deluxe — Residential basement renovation. In-house team. Meticulous work. Transformed space.

Basement renovation—turn your unused square footage into real living space. At Groupe Deluxe, we've been renovating residential basements for over 15 years. We know what's hiding behind those walls, and we know how to transform a dark, underused space into something you'll genuinely want to live in.