Greenfield Park is experiencing a veritable wave of renovations. Statistics Canada data show residential investment growth of 0.3 % in Q1 2025, and the Quebec renovation market now stands at $36.6 billion.

On the South Shore, renovation spending jumped by 19 % compared with last year. That's not surprising when you know the area - houses from the 50s to the 70s, growing families, homeowners who want to stay in their neighborhood rather than move.

At Cartago Construction, we've been working in Greenfield Park for years. We can see exactly which renovations dominate: modern bathrooms, functional kitchens, basement conversions, and exterior renovations to protect against moisture. We'll tell you why these projects are so popular, and what you need to know before taking the plunge.

Why renovations are exploding in Greenfield Park this year

The economic climate is driving homeowners to invest in their current homes rather than buy elsewhere. With interest rates remaining high and materials inflation continuing (+0.9 % this year), renovating often makes more sense than moving.

Greenfield Park also has a unique demographic composition. Approximately 58 % of households are families of three or more. These families need space - offices for telecommuting, extra bedrooms, multi-purpose spaces.

Most of the housing stock dates from 1950 to 1970. These homes and plexis have character, but are in need of major updating: outdated insulation, electrical systems in need of modernization, moisture problems in basements. It's not just a question of aesthetics - it's a question of comfort and durability.

Aging population + growing families = need for space

The population aged 40 to 60 has increased by 1.8 % in the area. These homeowners want to adapt their homes for aging in place: ramps, walk-in showers, ground-floor bedrooms.

At the same time, young families are buying these homes and looking to create space for their children. The conversion basement is becoming almost systematic - it's often the only way to add 400 to 600 square feet without building an expensive extension.

The classic problem in plexis built in the 50s and 70s: dampness in the basement. Poorly waterproofed stone or concrete block foundations let water in. If you want to finish your basement, you have to solve this problem at source.

Impact of residential costs (+15 % YoY) on renovation projects

Renovation costs climbed by 15 % compared with last year. Materials rose by 0.9 %, and exterior work jumped by 7.4 % - mainly due to wood and cladding prices.

This increase forces owners to prioritize. You can't do everything at once like you used to. People are now planning in phases: structure and waterproofing this year, finishing next year.

The good news is that the subsidies have followed. Novoclimat offers rebates of up to 25 % on certain energy-efficient projects. For a major renovation, that can mean 3,000 $ to 8,000 $ less to spend.

Greenfield Park's most popular renovations in 2025

According to our work sites and APCHQ data, five types of renovation completely dominate the market. They all meet the concrete needs of homeowners in the sector.

Bathroom modernization (walk-in, accessibility, damp-proofing)

Bathroom renovation booms - we're talking about a 25 % increase in demand in 2025 compared with last year. Homeowners want modularity and accessibility.

The walk-in shower has become almost standard. No more hard-to-reach clawfoot tubs. People want a spacious shower with a glass door, built-in bench and RBQ-compliant non-slip floor.

Moisture remains the major challenge in Greenfield Park's older bathrooms. We still see standard gyproc walls buckling after a few years. Moisture-resistant gyproc (green or violet) should be used, and adequate mechanical ventilation installed.

Novoclimat grants cover up to 25 % of the cost if you incorporate energy-efficient features such as low-flow faucets, low-energy toilets and efficient electric floor heating. It's an opportunity worth seizing.

Realistic budget for a complete bathroom in Greenfield Park: between 12,000 $ and 22,000 $ depending on surface area and finishes. RBQ-certified non-slip tiles cost more, but are non-negotiable for safety.

Common bathroom myths

We often hear, «Any bathroom renovation will increase the value of your home.» Not true. Only 60 % of renovations generate a real return on investment.

What counts is quality of execution and adaptation to the needs of the local market. An ultra-luxurious bathroom in a Greenfield Park plexis will unbalance the value. A modern, functional, well-designed bathroom - that sells.

Functional, energy-efficient kitchen (20,000-35,000 $)

The kitchen remains the heart of the home. Greenfield Park homeowners are now looking for kitchens that combine modern aesthetics with energy efficiency.

Kitchen renovation costs rose by 0.3 % this year, mainly due to materials inflation. But demand hasn't slowed down - people just want to plan better.

Trends in 2025: ceiling-high cabinets for maximum storage, quartz countertops (more durable than granite), Energy Star built-in appliances, LED under-cabinet lighting.

The central island has become almost mandatory in renovated kitchens. It creates additional preparation space, provides storage and serves as a social zone. In plexis where the kitchen is small, we often opt for a mobile island that can be moved as needed.

Typical budget for a complete kitchen in Greenfield Park: between 20,000 $ and 35,000 $. This includes cabinets, countertop, sink, faucets, appliances and installation. High-end finishes can easily exceed 45,000 $.

Ventilation is often neglected. In older homes, the hood draws in air but doesn't properly exhaust it anywhere. You need to install a system that really vents to the outside, not just a fan that recirculates the air.

Basement conversion: office, bigeneration housing, family space

Basement conversion is probably the most popular project at the moment. The average return on investment is 7 % of the property value. The average cost to completely finish a basement in Greenfield Park is around 79,000 $ - but this varies enormously depending on the initial condition.

Owners transform these spaces into offices for telecommuting, housing for aging parents (bigeneration), or family spaces with playroom and home cinema.

Challenge number one: humidity. Greenfield Park's clay soils retain water. Without proper perimeter drainage and waterproofing membrane, you'll have mold problems in less than two years.

The new 2025 RBQ standards for wetlands are more stringent. If you're building a basement, you now have to install a compliant drainage system and use moisture-resistant materials. This isn't an option - it's a permit requirement.

We always recommend starting with a thorough inspection: moisture test, foundation crack check, assessment of existing drainage system. It may seem expensive at first (500 $ to 1,000 $), but it avoids disasters at 20,000 $.

Bigeneration units require a separate entrance, a full kitchen and an accessible bathroom. The Ville de Longueuil has specific regulations - some areas of Greenfield Park allow this type of layout, others do not. Check before you plan.

Exterior renovations (siding +7.4 %, eco-windows)

Exterior work has seen the biggest rise in costs: +7.4 % in 2025. But it's also where owners see the best returns on investment - especially in a rainy climate like ours.

Exterior cladding protects the structure of the house. Old asbestos shingles or crumbling roughcast let water seep in. Replacing siding with fiber cement or quality vinyl is an investment that pays off.

The City of Longueuil has launched a greening program with a budget of $10 million. It includes incentives for eco-friendly exterior facades - sustainable materials, colors adapted to the neighborhood, vegetation.

Energy-efficient windows are another priority. Old single-glazed windows from the 1960s lose an incredible amount of heat in winter. Switching to Energy Star-certified triple glazing can reduce heating costs by 15 to 25 %.

Typical budget to completely resurface a standard plexis: between 15,000 $ and 30,000 $ depending on the material chosen. Windows add 8,000 $ to 15,000 $ depending on number and quality.

Eco subsidies can cover part of the cost - check out the Novoclimat and Rénoclimat programs before you start. We've seen customers save up to 5,000 $ with combined grants.

What's influencing renovations in this borough (Greenfield Park)

Greenfield Park has characteristics not found everywhere on the South Shore. The soil, the type of buildings, municipal bylaws - all these influence what can be done and how it should be done.

Clay soils + old foundations = importance of drainage

Greenfield Park's clay soils are notorious. Clay expands when it absorbs water and contracts when it dries. This creates enormous pressure on the foundations.

Houses built in the 50s and 70s rarely have adequate perimeter drainage. The result: foundation cracks, water infiltration and chronic basement dampness.

We still see too many homeowners attempting DIY repairs without understanding the root cause. They seal the cracks from the inside, but the water continues to grow from the outside. Two years later, the cracks are back.

The lasting solution: complete French drain with waterproofing membrane on the outside. It costs between 8,000 $ and 15,000 $, depending on the surface area, but it solves the problem once and for all. Corrections after DIY mistakes cost an average of 15 % more than if you'd done things right from the start.

Green zones = permit deadlines +20 % in 2025

Some areas of Greenfield Park are designated as protected green zones. This means that building permits take longer to obtain - we're talking about a 20 % increase in delays by 2025.

If you want to do a basement conversion with an egress window, an extension, or change the exterior appearance, you have to go through an additional environmental assessment. It's time-consuming, but it's to protect the character of the neighborhood.

Our advice: allow 4 to 6 weeks to obtain your permit instead of the usual 2 to 3 weeks. Start the process well before you plan to start work.

Aging housing stock 1950-1970: what you need to know

Houses and plexis of this era share common challenges. Insulation is often minimal - we're talking packed mineral wool or even no insulation at all in some walls.

The vapour barrier is either non-existent or poorly installed. This creates condensation problems that damage the structure in the long term. When walls are opened up during a renovation, hidden mold is regularly discovered.

Modern blown-in insulation (cellulose or fiberglass) is an excellent solution for improving energy efficiency without demolishing everything. It can be blown into existing walls through small holes that are then closed.

Electrical systems of this era are often at 100 amps - insufficient for today's needs. If you're renovating, it's a good time to upgrade to 200 amps. It costs about 2,500 $ to 4,000 $, but it's almost mandatory if you're adding modern appliances or an air-conditioning system.

How to know which renovation to prioritize (Decision-making guide)

With a limited budget, you have to choose wisely. Here's the logical order recommended by construction experts - and validated by the new RBQ 2025 rules.

Structure and humidity first (RBQ rule 2025)

There's no point renovating the interior if the structure is compromised. Always start with :

Foundation waterproofing - If your basement is leaking, fix it first. Perimeter drainage, exterior membrane, sump pump if necessary.

Repair of structural cracks - Cracks larger than 3 mm need to be assessed by an engineer. Some require stabilization piles.

Roofing and gutters - A leaky roof destroys everything else. Replace 20-year-old shingles and install gutters that direct water away from the foundation.

This phase seems thankless - you spend 10,000 $ to 20,000 $ without seeing any aesthetic change. But it's the foundation of everything. To skip this stage is to build on sand.

Then comfort and energy efficiency

Once the structure is solid, you can invest in day-to-day comfort:

Blown insulation - Improves the thermal envelope. Between 2,000 $ and 5,000 $, depending on surface area, and easily reduces heating costs by 20 %.

Energy-efficient windows - Replaces old windows. The return on investment is measured in energy savings and immediate comfort.

Ventilation system - Older homes are often poorly ventilated. An air exchanger (HRV) costs 3,000 $ to 5,000 $ and drastically improves air quality.

These investments often qualify for Novoclimat grants. Take advantage of them to reduce your total bill.

Aesthetics and style last

Once you've settled on structure and comfort, you can concentrate on aesthetics:

Kitchen and bathrooms - They add value and improve everyday life, but only if the house is structurally sound.

Coatings and colors - The 2025 trends on the South Shore favor natural tones: soft gray, warm beige, sage green. Fiber-cement siding imitates wood without the maintenance.

Landscaping - A well-landscaped exterior can add 5 to 8 % to resale value, especially in a neighborhood like Greenfield Park where green spaces count.

This phased approach means you can renovate intelligently without breaking the bank. Work can be spread over 2 to 3 years, while respecting logical priorities.

Why choose Cartago Construction for your Greenfield Park renovations?

We know Greenfield Park like the back of our hand. Yassine Troudi, our founder, has over ten years' experience in residential construction in Quebec. We've worked on dozens of plexis and houses from the 50s and 70s in the area.

Get a free estimate for your project in Greenfield Park.

10+ years of expertise in plexis and houses from the 50s and 70s

We know exactly what problems to look for. Moisture in basements, concrete block foundations, outdated electrical systems, missing insulation - we've seen and fixed all these problems hundreds of times.

Our approach: complete evaluation before bidding. We go to your home, we inspect, we identify potential hidden problems. No surprises along the way.

We have mastered modern waterproofing and drainage techniques adapted to clay soils. It's not the same as working in Montreal or Laval - the soils are different, and so are the challenges.

RBQ, full insurance and certified subcontractors

Cartago Construction is RBQ certified and fully insured. All our subcontractors have their own licenses and insurance. You'll never take a risk with us.

Our process is transparent from A to Z. We explain each step, show you the options, and respect deadlines. You always know where we stand and how much it costs.

We also manage all permits with the City of Longueuil. We know the inspectors, we understand the requirements, we make sure everything is in order. You don't have to worry about it.

Human approach and sustainable results (see Greenfield case study)

Our strength lies in our personalized approach. We take the time to understand your needs, your budget, your priorities. We never push solutions that don't suit you.

Recent case: basement conversion in a Greenfield Park plexis in 2025. The owner wanted to create a home for his aging mother. We managed the waterproofing, the addition of a separate entrance, and the complete fit-out. The result: a 15 % increase in the building's rental value.

We use sustainable materials and do things right the first time. No shortcuts, no temporary solutions. Our renovations last.

Schedule your free evaluation visit today.

Common myths about Greenfield Park renovation (and the truth)

There are a lot of misconceptions out there. Here's what we hear regularly and what's really true.

Myth: DIY saves money

Many homeowners think they'll save money by doing the work themselves. The reality is more complicated.

DIY error corrections cost an average of 15 % more than if you'd hired a professional from the start. Why is this? Because it's often necessary to undo what's been done wrong before redoing it right.

DIY works for small cosmetic projects - painting, wallpaper installation, shelf installation. But for anything involving structure, electricity, plumbing or waterproofing, hire a pro.

Myth: Indoors is more profitable than outdoors

We often hear, «Renovating my kitchen is going to make me more money than redoing my siding.» Not true.

In rainy areas such as Greenfield Park, the return on investment for the exterior renovations can reach 10 % more than the inside. And why? Because a well-maintained exterior protects the entire structure and reassures potential buyers.

A buyer who sees new siding and a new roof knows that he won't have to do any major work on it in the next 10-15 years. It's worth its weight in gold.

Myth: Plexis are too old to be renovated

Approx. 75 % of the plexis of Greenfield Park can be adapted for bigeneration housing or modern configurations. These are far from being lost cases.

The basic structure is often solid. What's missing is insulation, waterproofing and modern finishes. All this can be corrected without demolition.

Renovating an old plexis is also more environmentally friendly than demolishing and rebuilding. You conserve existing materials, reduce waste and preserve the character of the neighborhood.

FAQ - Frequently asked questions from Greenfield Park homeowners

How much does a bathroom renovation in Greenfield Park cost?

For a complete bathroom (shower, toilet, vanity, tiles), count between 12,000 $ and 22,000 $. Projects with walk-in showers and high-end finishes can exceed 30,000 $. Novoclimat grants can cover up to 25 % if you incorporate energy-efficient features.

Do I need a permit for a finished basement in Longueuil?

Yes, absolutely. Any basement development requires a permit from the City of Longueuil. This includes electricity, plumbing, egress windows and bedrooms. Fines for work without a permit can reach 50,000 $.

What subsidies are available (Novoclimat, SHQ)?

Novoclimat offers up to 25 % rebates on energy-efficient renovations. The Société d'habitation du Québec (SHQ) has programs for home adaptation (accessibility) and major renovations. Check your eligibility before you start - some subsidies must be approved BEFORE work begins.

How to manage humidity in 1950-70 basements?

Start with the exterior: perimeter drainage, gutters to keep water away, correct slope of the land. Then waterproof the foundation with a suitable membrane. Inside, use moisture-resistant materials and install a permanent dehumidifier.

When is the best time to renovate on the South Shore?

Spring (April-May) and autumn (September-October) are ideal. Contractors are more available and weather conditions allow outdoor work. Summer is high season - lead times are longer and prices slightly higher. Winter is for interior projects only.

Is it profitable to renovate before selling?

It depends. Structural renovations (roofing, waterproofing, windows) have an ROI of 80 to 100 %. Cosmetic renovations (kitchen, bathroom) recoup 60 to 75 % of the investment. If you're selling in less than a year, concentrate on essential repairs and visual presentation.

What sustainable materials should I choose for my exterior?

Cement fiber imitates wood without the maintenance - it lasts 50 years. Quality vinyl (minimum thickness 0.046″) stands up well to the Quebec climate. For roofing, architectural shingles last 30 years versus 15 for standard shingles. Avoid cheap materials - they cost more in the long run.

How to avoid cost overruns?

Have a complete inspection done before you bid. Allow 10 to 15 % for contingencies. Choose your finishes before you start - it's expensive to change your mind midstream. Work with a transparent contractor who clearly explains each expense item.

Talk to an expert at Cartago to clarify your renovation project.

Ready to transform your Greenfield Park property?

Cartago Construction offers you free, no-obligation evaluation. We come to your home, assess your needs, identify priorities, and present you with a realistic plan tailored to your budget.

📞 438-932-4326 ✉️ info@cartagoconstruction.ca 🌐 cartagoconstruction.ca

Office: 2580 Rue Cartier, Longueuil, QC

RBQ-certified contractor | Insured and licensed | Over 10 years' experience in plexis and houses from the 50s and 70s