Basement Finishing in Lévis

What's your basement like right now? A cold space with concrete walls, pipes hanging down, and a musty smell? Or maybe just a big dumping ground where you throw everything you don't know where to put?

We know how to manage humidity, insulate properly, and create a well-finished space that your family will really use.

Tell us about your project — free quote with full on-site assessment.

Why Finishing a Basement in Lévis Pays Off

In Lévis, houses often have full or semi-basements. This is unused space that could be put to good use: a family room, a guest room, a home office, a playroom for the kids, or even rental accommodation to generate income.

But it has to be done right. With our cold winters and humidity coming from the river or groundwater, a poorly insulated or poorly ventilated basement will quickly become a problem with mold, cold floors, and odors.

You often see this in old bungalows in Saint-Étienne or houses built in the 70s and 80s in Lauzon: basements hastily finished by a cheap contractor who just put up drywall without insulating, waterproofing, or thinking about ventilation. The result? Mold in the walls, warped floors, and a room that no one wants to use.

We do it by the book.

What We Do When We Finish Your Basement

Moisture inspection and assessment

Before touching anything, we inspect your entire basement. We check for water infiltration, cracks in the foundation, drainage problems around the house, or signs of mold.

If moisture is found, fix the problem at the source before starting the finishing work. This may mean installing a waterproof membrane, repairing cracks, improving exterior drainage, or adding a permanent dehumidifier.

Thermal and acoustic insulation

Rigid polystyrene insulation or mineral wool is used depending on the type of foundation. For basements in Lévis, the goal is at least R-20 on exterior walls to keep heat in during winter and prevent condensation.

If you want a quiet movie theater or office, we can also add soundproofing to the ceilings and walls.

Gypsum installation and wall finishing

Moisture-resistant drywall (type X or, better yet, green drywall) is installed over the entire surface. Next, the joints are filled, sanded, and the walls are prepared for painting. Everything is done neatly, without bumps or visible lines.

Durable and comfortable flooring

For basement floors, SPC (stone plastic composite) vinyl or laminate flooring with a waterproof underlayment is often recommended. These materials are moisture resistant and remain comfortable underfoot, even in winter.

If you want carpet in a bedroom or playroom, we make sure the floor underneath is well insulated and waterproof before laying it.

Lighting and electricity

Basements are often dark. We install recessed lighting (pot lights) to create uniform lighting, and add electrical outlets in the right places depending on the use of each room.

All wiring is done in accordance with the Quebec Building Code, inspected and approved.

Addition of a bathroom (optional)

If you want to add a bathroom to your basement, we'll take care of everything: plumbing, floor drain, toilet, shower, vanity. It's super convenient if you're finishing your basement to turn it into a guest room or master suite.

Common Problems Encountered in Lévis

Moisture and mold

This is the number one problem in basements in Lévis, especially in areas close to the river such as Saint-Romuald or Saint-Nicolas. Moisture can come from outside (infiltration), from the ground (capillary action), or simply from a lack of ventilation.

This can be resolved with proper sealing, rigid insulation that blocks vapor, and adequate ventilation.

Cold and uncomfortable floors

If your basement is on a concrete slab with no insulation underneath, it will remain cold even with heating. Insulating underlayment (such as DRIcore) is often installed before laying the final floor covering.

Ceilings too low

Many homes in Lévis have basements with ceilings that are only 7 feet or 7 feet 6 inches high. We work with this by using thin suspended ceilings or leaving the joists exposed with a clean finish, depending on your style.

Old, undersized electrical panels

If you want to add heating, lights, and outlets in the basement, your electrical panel must be able to handle it. We assess this at the outset and let you know if an upgrade is necessary.

Compliant access and exits

For a basement to be habitable according to Lévis city standards, it often needs to have an emergency exit window. We make sure everything is compliant before finishing the work.

Why Choose SRQ to Finish Your Basement in Lévis?

We are based here in Lévis (2552 Chemin du Fleuve), and we know the challenges of basements on the South Shore: the shifting clay soil, the humidity coming from the river, the old stone foundations from the 1950s and 1960s.

We have finished dozens of basements. In Charny, Saint-Nicolas, Saint-Jean-Chrysostome, Pintendre, Saint-Rédempteur, and everywhere in Lévis. We know what to do and how to do it to make it last.

Each project comes with our 5-year warranty on labor. And we work cleanly: we protect your floor from above, we pick up our trash every day, and we vacuum before we leave.

Over 500 satisfied customers. Rating of 4.9/5. RBQ license 5811-7821-01.

How Much Does It Cost to Finish a Basement in Lévis?

It depends on the size, the current condition of the subfloor, and what you want to include. Here are some estimates based on our local experience:

• Basic finish (600 sq ft, without bathroom) : between 18,000 $ and 28,000 $
• Average finish with bathroom (800 sq. ft.) : between 32,000 $ and 48,000 $
• Fully finished with kitchen and living space (1,000 sq. ft.) : between 55,000 $ and 75,000 $

These prices include: insulation, drywall, painting, floor, electricity, lighting, doors, stair finishing.

Extras such as a full bathroom (+$8,000 to $15,000), a kitchen (+$12,000 to $25,000), or foundation work are calculated separately.

Every basement is different. We always give you a clear, detailed quote with no hidden costs.

The Process — From Start to Finish

Step 1: Call or write to us

Call 418-476-1747 or fill out the form. We'll discuss your project and set up an appointment quickly.

Step 2: Free visit and assessment

We come to your home in Lévis. We take measurements, assess humidity, check the electrical and plumbing systems, and discuss what you want as the final result.

We will provide you with a detailed quote before we leave.

Step 3: Planning and permits

If necessary, we will take care of the permit with the City of Lévis. We will keep you informed of each administrative step.

Step 4: Finishing work

We start with insulation, then drywall, electrical work, flooring, and finally painting. Everything is done in logical order to ensure flawless results.

The work generally takes between 3 and 6 weeks, depending on the size of the project.

Step 5: Final inspection and warranty

We'll walk you through everything to make sure everything is perfect. We'll clean thoroughly, give you the warranty documents, and show you how to maintain your new basement.

We Serve All Areas of Lévis

Whether you are on the River Trail, in Saint-Romuald near Main Street, in Charny on the River Road, in Saint-Nicolas towards the Marie-Victorin, or in the new developments in Pintendre—we travel all over Lévis and the surrounding area.

We know the unique features of each area: the old stone foundations in Vieux-Lévis, the clay soils in Lauzon, the semi-underground basements in Saint-Étienne.

FAQ — Frequently Asked Questions About Basement Finishing

Can I finish my basement if there is sometimes moisture?

First, you have to fix the moisture problem. If you end up covering up a water problem, it will only get worse and create mold in the walls. We always assess the moisture level before we start.

How long does it take to finish a basement?

Between 3 and 6 weeks in general, depending on the size and what is included. A standard 700 sq. ft. basement with a bathroom can be done in 4-5 weeks.

Can I live in the house during the renovation work?

Yes, absolutely. We mainly work in the basement, so it doesn't disturb life upstairs too much. We protect the floors, tidy up our things every evening, and are careful not to make too much noise if there are children or people working from home.

Do you need a permit to finish a basement in Lévis?

Yes, in most cases. If you are working on electrical or plumbing systems, or creating habitable rooms, a permit is required. We will take care of this for you.

What is included in your 5-year warranty?

All labor: drywall, insulation, electrical, plumbing, flooring. If anything breaks down because of our work, we will come back and repair it at no charge.

Do you remove the old finish if there is one?

Yes. If your basement is already finished but in poor condition, we'll take everything apart, inspect it, and start from scratch if necessary.

Ready to enjoy all that space?

Stop wasting your basement. It's often 600 to 1,000 square feet of space that you pay to heat but don't use.

A well-finished basement means more living space, increased value for your home, and often a space that can generate income.

We are based in Lévis, we work cleanly, and we do it by the book.

Call us at 418-476-1747 or fill out the form for your free quote.

5-year warranty · RBQ license 5811-7821-01 · Over 500 satisfied customers in Lévis and on the South Shore.