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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 2026
    • Best of Newly Listed 2023

    Need a basement walkout, underpinning or a house addition for your property? Or may be a new patio , walkway or stairs ? How about new concrete slabs ( garage , basement ) or a pad for a shed ? Concrete Master is the premier commercial & residential concrete contractor in Toronto. What Can We Help You With? Concrete Master is here to help. Our team has the tools and experience to make we complete your project on time. We are your one-stop shop for concrete services. Why Choose Concrete Master? Are you looking for an affordable concrete company that you can trust? Concrete Master is a licensed and insured company, offering high-quality products and premium workmanship at affordable prices! We bring your vision to life! Give us a call

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    I've been working in the construction industry for 5 years and during those 5 years I have learned and master multiple skills. My construction journey started as an insulator where I've been doing projects for private houses. I also worked in residential framing and i developed my carpentry skills. Installing drywall is another skill in my pocket.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Albert Hamilton is a North York based Landscaping Company, Mason, Concrete Specialist, General contractor, Flooring Contractor, Tiler, Paving Contractor & Pool company company. Our goal is to provide quality service and excellent workmanship to our customers. If you need help with install concrete floor, pave outdoor and garden, landscape curbing & brick and stone flatwork repair, message us so we can assist you and arrange a quote.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are a reliable and experienced construction company based in Toronto. We specialize in drywall, flooring installation, concrete work, paving, and general home renovations. We take pride in delivering clean, high-quality work with attention to detail. Whether it’s a small repair or a full project, we ensure professional results and fair pricing. We are available anytime and ready to take on your project.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are a new company but with a team of professionals with years of experience in insulation. We are sure that your project will pass any inspection because we work with the best quality.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are committed to delivering high-quality craftsmanship and dependable service for every project. We specialize in roofing, masonry, and foundation repair, providing durable solutions for residential and commercial properties. Our experienced team takes pride in using quality materials, maintaining attention to detail, and completing every job safely, on time, and within budget. Whether you need a roof repair or replacement, brick and stone masonry, chimney work, foundation repairs, or waterproofing, we are dedicated to protecting and improving your property with workmanship you can trust. Customer satisfaction is our top priority. We believe in honest communication, fair pricing, and reliable results that stand the test of time. Contact us today for a free estimate and let us help keep your home or business strong, safe, and looking its best.

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  • Basement Waterproofing Specialist in Thornhill, Ontario
    • Best of Awards 2026

    Waterproofing PD specializes in Waterproofing, Drains, Underpinning, Additions and many more. Using best products available for the job, no corners cut. We do all the jobs in the house, no sub-contracting. Also offering amazing 25 year warranty that is fully transferable on all our waterproofing jobs. We also do Underpinning, Walkouts, Concrete floors, Additions excavations and foundations , Slab on grade. *** Services Included: *** Exterior waterproofing Interior waterproofing Sump Pump Drain repair Pipe Burst Waterline service Backwater valve Underpinning Addition excavation and build Concrete floors Slab on grade *** We are fully licensed and insured. City of Toronto Rebates Available!!

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    I’m Saeid, your hardworking assistant and repair man to help you with your home stuffs. I’m working in this industry for over 10 years, I did a lot of painting, renovation, assembling the furniture, handyman jobs and anything related to this work! I can work in GTA are, or even out as I have a car to move around. Regardless of time, I’ll make sure that your work and things fixed properly

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  • Basement Waterproofing Specialist in Thornhill, Ontario
    • Best of the Best 2025
    • Best of Awards 2026

    Direct Basement Waterproofing team is the most experienced and affordable privately owned company that offers waterproofing and drain services to families and businesses across the Greater Toronto Area. Based out of Toronto and operating several trucks across GTA, we are conveniently located to service you in the great Souther-Ontario region. With more than 25 years of experience our trained technicians offer a quality, reliable and stress free waterproofing service. In addition, our friendly and professional staff is here to answer any questions you may have about our company or our services. Have an emergency? Don’t hesitate to call us immediately. Our 24 hour Emergency phone line is here to serve you better.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Elite Yard Maintenance – Our Services •Weekly Lawn & Yard Care •Grass cutting / mowing •Lawn edging (driveways, walkways, garden beds) •Weed control (lawn, garden beds, interlock & walkways) •Garden bed maintenance & clean-ups •Leaf and debris removal •Yard waste removal & off-site disposal. Seasonal Services •Spring & fall clean-ups •Hedge & shrub trimming •Interlock / hardscape weed control •Lawn Care & Spring Preparation •Fertilization & lawn treatments •Aeration & overseeding •Mulch installation & garden bed refresh

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Hi, my name is Carlos Loureiro, and I’ve been proudly working in the drywall industry for over 35 years. Throughout my career, I’ve built a reputation for quality workmanship, reliability, and attention to detail. From residential homes to commercial projects, I bring decades of hands-on experience to every job. I understand that drywall finishing is more than just mud and tape — it’s about precision, clean lines, and delivering a smooth, flawless result that sets the foundation for everything that follows. I take pride in doing the job right the first time. My goal is always to provide professional results, honest communication, and a clean, efficient work process from start to finish. If you’re looking for experience you can trust and craftsmanship that stands out, I look forward to working with you. — Carlos Loureiro

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We work with quality, we understand the economy, we are clean with 9 years of experience, and we solve problems.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    At Faraj Home Services, we’re dedicated to transforming the outdoors of your home into welcoming, inviting, and practical spaces. We provide a comprehensive range of landscaping and construction services to residential properties across the Greater Toronto Area (GTA) including Toronto, Richmond Hill, Vaughan, Newmarket, & more. Discover how we can elevate your property with our personalized approach to landscaping. As we are based in Richmond Hill, we proudly serve York Region and the surrounding GTA area. Faraj Home Services is the best choice for your next exterior construction and landscaping project because it is our specialty. Contact us today for a free complimentary quote!

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    🏡 Daniel’s Handy Services – Your One-Stop Solution! 🛠️ Services Offered: Handyman Work: Repairs, installations, maintenance – no job too small! Painting: Interior & exterior painting, residential & commercial. 🚚 Moving – Packing, loading & unloading Excavating: Land clearing, digging, grading – reliable and efficient. ✅ Affordable Rates | ✅ Professional & Reliable | ✅ Satisfaction Guaranteed. “From fixing your home to boosting your health, we do it all!”

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    T&R Contracting is a trusted full-service renovation company dedicated to delivering quality craftsmanship and exceptional customer service. We specialize in bathroom and kitchen renovations, home additions, framing, drywall, painting, basement finishing, and complete home remodels. Whether you're updating a single room or transforming your entire home, our experienced team is committed to completing every project with attention to detail, clear communication, and reliable service. We take pride in bringing our clients' visions to life, on time, on budget, and built to last.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Aaron's Prefabricated Outdoor Structure Building Service description The service I am providing is installing prefabricated Outdoor Structures like Sheds, Gazebo, Pergolas, and Solariums from big box stores such as Home Depot,Rona,Canadian tire. If base is needed or wanted for Structure prices will vary. Small Size Outdoor Structure Size and prices Sizes (feet) - 3x2 - 7x9 Price to install Outdoor Structure - 300 Medium Size Outdoor Structures size and pricing Sizes (Feet) - 10 x 10 - 12 x 12 Price to install Outdoor Structure - 500 Large Outdoor Structures Sizes and Pricing Sizes (Feet) - 13x13 - 25x12 Price to install Outdoor Structure - 900

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4.7

Top rated Basement Waterproofing Specialists

Our Basement Waterproofing Specialists in Thornhill, Ontario, are rated 4.7 out of 5 based on 45 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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