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Find basement waterproofing pros in Thornhill, Ontario

If you’re looking to protect your basement from leaks, floods, or humidity, HomeStars can help. Our platform allows you to easily connect with professionals who can help with basement waterproofing in Thornhill, Ontario. Compare quotes, read reviews, and make the hire all in one convenient place!

Closeup of a worker’s gloved hands waterproofing the bottom of a concrete wall with blue sealant.

Some of our top rated basement waterproofing specialists in Thornhill, Ontario

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  • Basement Waterproofing Specialist in Thornhill, Ontario
    • Best of the Best 2025
    • Best of Awards 2025

    SHG for the last 24 years has build numerous single and multi residential Homes . We specialize in Design Build Custom Homes, Additions, Extensions, Underpinning. Entire construction is done by our insured Company employees, all of whom carry WSIB. We are Vertically integrated company. Which means we do Foundation (Including Underpinning, Walk-out and all related concrete forming and Pouring), Framing, Roof, Insulation, Drywall, Mudding, Tapping, Sanding, Tiling, Flooring, Trim, Doors, Locks, Installing all Fixtures In-House with 28 Dedicated employees all of whom are covered by WSIB. We are not depended on Sub-trades. Therefore we do not charge Project Management fee. We have dedicated Hvac, Electric and Plumbing Licence companies that work with us all year long. The process starts by preparing a detailed scope of work with PRECISE price and time frame for the entire project. We have numerous Home owners who have become our loyal advocates. SHG is a vertically integrated company which passes on savings to you. We have a team of Designers, Architects and Engineers to help you create precise Design oriented, meticulous attention to finishing, permit drawings based on your needs, wants and requirements. SHG is with you all through the process. We thank you for visiting our profile. Team SHG looks forward to providing highly professional, patient and organized approach for your project.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    MC Solutions is a trusted drywall and renovation company serving the Greater Toronto Area. We specialize in high-quality custom drywall, residential and commercial projects, insulation, taping, and complete interior renovations. With a strong focus on precision, safety, and clean finishes, we deliver reliable workmanship for homeowners, contractors, and businesses. Our team provides efficient timelines, competitive pricing, and results that elevate every space. Whether it’s a small repair or a full-scale renovation, MC Solutions is committed to delivering professional service and lasting quality.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    My name is Aldwin, and I am 26 years old. I work as a handyman, helping homeowners with repairs, maintenance, and small renovations. I take pride in being reliable, detail-oriented, and making sure every job is done properly and safely. Whether it’s fixing drywall, installing fixtures, or handling general home improvements, I enjoy solving problems and improving people’s homes with quality workmanship.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Hard working, honest and kind

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Masons Edge offer residential, institutional and commercial services for 32 years. Our Services: Install Brick and Stone Floors/ Blocks, Walls, Brick and Stone Flatwork Repair, poured concrete floors and walls,excavation

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    VHP Services Inc is your trusted partner for expert drain solutions in Great Toronto Area (GTA). With years of industry experience and a commitment to excellence, we specialize in keeping your plumbing systems running smoothly and efficiently. From stubborn clogs to complex drain repairs, our skilled team is equipped with advanced tools and proven techniques to handle any challenge. We believe that preventing plumbing emergencies is just as important as fixing them. That’s why we offer proactive, long-lasting solutions tailored to your needs whether you’re a homeowner, business owner, or property manager. At VHP Services, we pride ourselves on reliability, professionalism, and customer satisfaction. No matter the issue, no matter the time, you can count on us to deliver quality service and peace of mind. Please feel free to contact us now for a FREE Estimate!

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are a family business dedicated to doing the best we can in our work.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Strong Basements Inc. - Toronto’s trusted basement specialists since 2010. We transform wet, low and unfinished basements into safe, dry and comfortable living spaces, delivering complete solutions in basement lowering, waterproofing, walkouts, flood protection and structural concrete work. Our services include full-scope basement lowering and underpinning with engineering, permit handling, excavation, non-shrink/overpour/L-shape methods, structural upgrades with LVL or steel beams, load-bearing posts on concrete footings, main waterline relocation, full waterproofing, drainage, sump pump, sewage ejector systems, radon mitigation and new insulated concrete slabs. We perform basement waterproofing including leak diagnostics, exterior excavation, foundation repair, crack sealing, parging, membrane installation, weeping tile systems, window wells, sump pumps, backwater valves and assistance with City of Toronto rebates. Our walkout construction division manages engineering, zoning, permitting, excavation, shoring, foundation forming, drainage, waterproofing, concrete stairs, masonry, door openings and safety railings. We also provide concrete and structural services such as concrete slab replacement, floor pouring with vapour barrier and insulation, in-floor heating and foundation repairs. Flood protection options include sump pumps, backwater valves and downspout disconnection with full rebate support. We are fully licensed and insured, holding Master Plumber and Plumbing Contractor licences, Building Renovator accreditation, Ontario College of Trades qualification and IICRC Water Damage Restoration Technician certification, with a 25-year transferable warranty on waterproofing and underpinning. Serving Toronto and GTA with professional project management from engineering to final inspection - Strong Basements Inc. makes your basement safe, usable and ready for future value.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    ALBCON Construction – Concrete, Interlock & Tiles! 📍 Ontario, Canada ✅ Concrete work & smooth finishes ✅ Interlock driveways & patios ✅ Indoor & outdoor tiling ✅ Removal and replacement of old concrete 💪 Quality, precision & fair prices.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    At Smart Home Improvements & Solutions, we proudly serve Scarborough and surrounding areas (within 50 km) with over 7 years of hands-on experience in residential construction, renovations, and property care. We provide a complete range of services — from full renovations to detailed cleaning and ongoing home maintenance — making us a one-stop solution for homeowners. Our team is known for being professional, punctual, and respectful, delivering high-quality workmanship while treating every home with care and attention to detail. ⸻ 🔨 Our Services: • Full home renovations • Decks (pressure treated, composite, PVC) • Fences (all types) • Kitchen & bathroom renovations • Basement finishing • Drywall & insulation • Interlock, walkways & sidewalks • Demolition ⸻ 🧹 Cleaning & Maintenance: • Post-construction cleaning • Deep home cleaning • Move-in / move-out cleaning • Regular home maintenance & repairs • Seasonal upkeep and property care ⸻ 🛠️ Additional Services: We also offer affordable assembly for sheds, gazebos, BBQ tables, and more.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Specializing in quality masonry and foundation repair services, we provide reliable solutions to protect and restore your property. From foundation crack repairs and waterproofing to brick, stone, and chimney restoration, we deliver durable craftsmanship and dependable service with a focus on lasting results and customer satisfaction.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Veles Construction Ltd. | Construction & Renovation Experts in the GTA Veles Construction Ltd. is a full-service construction and renovation company serving Toronto and the Greater Toronto Area (GTA). We deliver high-quality residential renovations, new construction, and commercial fit-out services with a strong focus on craftsmanship, clear communication, and long-term value. Our residential services include basement finishing, kitchen and bathroom renovations, whole-home and condo renovations, as well as structural upgrades and home additions. We also specialize in custom home construction, basement underpinning, laneway houses, garden suites, and multiplex construction. For commercial and industrial clients, we provide office, retail, restaurant, warehouse, and franchise renovations, along with specialized environments such as medical clinics, dental offices, wellness spaces, and fitness facilities.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Hello there! If you’re looking for a company that prides itself on quality work and the desire to please our clients, we’re the right fit for you. No matter how big or small the job is, commercial or residential we do it all.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are an exterior finishing company specializing in stucco, stone veneer, and painting services. With years of hands-on experience, we deliver high-quality craftsmanship and reliable service tailored to each project. From renovations to new constructions, we are committed to customer satisfaction and lasting results. Contact us today for a free estimate — let’s bring your exterior vision to life.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Transform Your Outdoor Space with Orber Landscaping We are a trusted landscaping company proudly serving the Greater Toronto Area (GTA). Our experienced team of designers and installers is dedicated to turning your outdoor vision into reality with high-quality workmanship, reliable service, and fair pricing. Every project is completed with attention to detail, ensuring lasting beauty, durability, and customer satisfaction. Why Choose Orber Landscaping? • Free Estimates • 3-Year Warranty • Professional & Reliable Team • High-Quality Workmanship • Competitive & Transparent Pricing • Fast Response & Clear Communication Our Services • Interlocking (Driveways, Walkways, Backyards) • Fence Installation & Repair • Deck Construction • Retaining Walls & Steps • Lawn Replacement • Exterior Brick & Stone Work • Natural Stone Installation • Flower Beds & Garden Design • Fire Pit Installation Contact Us Today! Get your FREE estimate and start transforming your outdoor space. For the most accurate quote, we recommend a free on-site visit, where we can take measurements and provide a customized design plan.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Viewpoint Concrete & Construction Completing Residential/Commercial Projects In The Greater Toronto Area. ✔ Expert Craftsmanship ✔ Reliable Timelines ✔ Built to Last ✔ Licensed & Insured expertly engineered concrete solutions designed for durability and architectural excellence.

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4.9

Top rated Basement Waterproofing Specialists

Our Basement Waterproofing Specialists in Thornhill, Ontario, are rated 4.9 out of 5 based on 35 reviews from homeowners like you.

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What basement waterproofing services are available in Thornhill, Ontario?

Pros can waterproof basements from the interior, the exterior, or using a combination of techniques. The right service depends on whether you need full waterproofing or just touch-ups.

Here are some common basement waterproofing services in Thornhill, Ontario:

  • Installation of interior drainage systems: a perimeter drain installed along the interior footing collects and redirects water to a sump pit for removal.
  • Sump pump installation and replacement: often handled by a [plumber](https://www.homestars.com/plumbing/plumber-pros/Thornhill, Ontario), a pump installed in the sump pit removes accumulated groundwater and directs it away from the foundation.
  • Exterior waterproofing: excavation around the foundation allows for membrane application and drainage board installation to block water at the source.
  • Crack injection: epoxy or polyurethane foam is injected directly into foundation cracks to seal them against water intrusion.

No matter your needs, it’s easy to find basement waterproofing pros near you who can help. Just post your project on HomeStars now, and available contractors in your area can reach out!

What are the average costs of basement waterproofing pros in Thornhill, Ontario?

Basement waterproofing costs vary widely depending on the method, the size of the foundation, and where repairs are concerned, the extent of the damage. Labour typically runs between $50 and $150 per hour, depending on the service and complexity of the job. Materials and equipment, such as excavation machinery, may add additional costs.

Typical costs for common basement waterproofing services in Thornhill, Ontario:

  • Installation of interior drainage systems: between $3,000 and $10,000 for a full perimeter system in an average-sized basement
  • Sump pump installation and replacement: between $500 and $2,000 depending on pump type and whether a backup system is included
  • Exterior waterproofing: between $10,000 and $30,000 depending on foundation size and depth of excavation required
  • Crack injection: between $300 and $800 per crack depending on length, depth, and material used

HomeStars tip: To ensure you get the most accurate costs for Thornhill, Ontario, make sure to get everything written down in an itemized quote. This avoids misunderstandings and supports transparency and clear communication for both you and the contractor.

How to find basement waterproofing specialists in Thornhill, Ontario with HomeStars

Finding a basement waterproofing pro in Thornhill, Ontario can feel overwhelming, especially when water damage requires prompt attention. HomeStars makes it easy to connect with the right pro for your project. Just follow these simple steps:

  1. Start by posting your project. Provide a clear description of your basement waterproofing needs and, if possible, include photos to get precise quotes.
  2. Receive offers from available pros, review work history, and read customer feedback for basement waterproofing in Thornhill, Ontario.
  3. Connect with basement waterproofing specialists in Thornhill, Ontario to discuss your project, request and compare quotes, and ask any questions.
  4. Hire the right pro to get the job done and leave a review based on your experience.

HomeStars tip: Once your project is done, make sure to leave a review. Our review system ensures that pros are rewarded for good work and held accountable for any problems.

Pros on HomeStars undergo checks at registration – such as ID documents, company details, and certifications for regulated jobs and skill assessments – allowing you to hire with confidence.

Extra peace of mind with the HomeStars Confidence Program

The HomeStars Confidence Program is designed to give you added confidence when hiring through our platform. If your job qualifies under the Program and we determine that a claim meets the Program requirements, HomeStars may cover what you owe the Pro on an eligible job with a quote of up to CAD $10,000, in line with our terms and conditions.

FAQ: Common questions about basement waterproofing in Thornhill, Ontario

How long does basement waterproofing last in Thornhill, Ontario?

Most professional waterproofing solutions in Thornhill, Ontario are designed to last 10 to 25 years depending on the method used and the quality of installation. Sump pumps typically require replacement every 7 to 10 years.

Will waterproofing fix existing mould in my basement?

Waterproofing addresses the source of moisture but will not remove mould that has already formed. A separate mould remediation service is typically required before or after waterproofing work is completed.

What if my basement waterproofing project in Thornhill, Ontario requires excavation?

Exterior waterproofing projects in Thornhill, Ontario often require excavation around the foundation, which adds complexity, time, and cost to the overall job. It is important to work with pros who can coordinate this process effectively. [Local excavation specialists](https://www.homestars.com/gardening-outdoors/excavation-specialist-pros/Thornhill, Ontario) are available on HomeStars to walk you through what to expect and collaborate with your preferred basement waterproofing pro.

Does homeowner insurance cover basement waterproofing in Thornhill, Ontario?

In most cases, standard home insurance policies do not cover waterproofing as it is considered a maintenance issue rather than sudden damage. However, water damage resulting from a specific event such as a burst pipe may be covered. It is worth reviewing your policy or speaking with your insurance provider for clarification.

How do I know if a basement waterproofing pro is right for my project?

Not all waterproofing projects are the same, and finding a pro with the right experience for your specific situation is important. Reading reviews from homeowners who have had similar work done can help you make a more informed decision. Browse basement waterproofing pros on HomeStars to compare ratings and reviews from real homeowners in Thornhill, Ontario.

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