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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

    We create custom outdoor spaces for homeowners in Mississauga, Etobicoke, and Toronto, turning backyards into functional, beautiful, and enjoyable areas. Our team specializes in fence installation, deck and patio construction, retaining walls, backyard landscaping, driveways, and sidewalks. We are committed to quality materials, expert craftsmanship, and professional service. From initial design and planning to construction and finishing touches, we handle every step to make your outdoor space perfect year-round. Our services include but are not limited to residential fencing, custom decks, patios, retaining walls, backyard landscaping, driveways, and sidewalks. Get a free estimate and start transforming your outdoor space!

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Thrust into the construction industry I began working since I was around 12 years old building family homes and working with my uncles. Have always been good with my hands and enjoyed the satisfaction of seeing the results of my skills and diligence at work. Have had a stronger focus on carpentry and virtually anything concrete related over the course of the last 15 years or so. Some of these include separate entrances, basement and bathroom renos/finishes, underpinning, extensions/additions, placing, leveling and finishing different types of concrete aggregates. I'm very honest and won't touch anything I am not comfortable or competent with but will cooperate with other professionals in their respected fields of that situation is encountered. Plenty of references when needed. Please feel free to reach out anytime.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Masonry Restoration services. Specializing in brick, block, natural stone, flagstone, interlock, waterproofing, concrete and underpinning.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    in all cases, the most important thing is quality

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are an innovative company with professional and trained people Ready to help you! Guaranteed job!

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Professional Insulation Services in Toronto & GTA We specialize in attic, basement, and wall insulation using high-quality materials like spray foam and fiberglass batts. With years of hands-on experience, we ensure every job is done efficiently, safely, and with attention to detail. Our goal is to improve your home's energy efficiency, comfort, and value. Reliable, clean, and fully insured. We pride ourselves on excellent customer service, quick response times, and competitive pricing. Let us help you stay warm in winter and cool in summer!

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Handyman & Home Maintenance Services Detail-oriented handyman providing reliable home maintenance and improvement services across the GTA. I specialize in small to mid-size residential projects, focusing on clean workmanship, safety, and practical solutions for homeowners. Services Include: • Deck and floor framing • Closet shelving and storage setup • Sink and faucet installation or replacement • Toilet installation and minor plumbing fixture work • Under-sink drain and P-trap adjustments • Basic water line connections (PEX & copper) • Outlet and switch replacement • Smoke & CO alarm installation • Appliance outlet preparation (where wiring already exists) • Baseboards, trim, and minor drywall patching I focus on maintenance, replacements, and improvements, not major system alterations. I work carefully, use proper tools and measurements, and aim for clean, efficient results with respect for your home.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Hi, I’m Siya, owner of TrueBond Floor Coatings Inc., a local floor coating business serving Stouffville, Markham, Richmond Hill, Aurora, Newmarket, and York Region. We specialize in garage floor epoxy and polyaspartic flake systems that make concrete floors cleaner, stronger, and easier to maintain. Our process includes concrete grinding, crack repair, epoxy base coating, decorative flake broadcasting, and a durable polyaspartic top coat. I focus on reliable workmanship, clear communication, and giving homeowners a finished garage floor that looks professional and holds up to daily use, salt, stains, and wear.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We offer reliable, high-quality services focused on meeting our clients’ needs with fast and effective solutions. Our commitment is to deliver results that exceed expectations in every project.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    NO DEPOSIT for most jobs. Transform Your Space with Vision to Home Renovations. We shape the unseen into the unforgettable. Serving Mississauga and Surrounding Areas. Whether you're planning interior renovations, need repairs, or want to upgrade your outdoor space with a new deck or fence, Vision to Home Renovations is here to help. Jason is ready to listen, advise, and bring your vision to life — no project is too big or small. Fully insured and licensed. Let’s connect to discuss your needs and arrange a free, no-obligation quote.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Delta Waterproofing Ltd.our mission is to be the most reputable in the waterproofing industry. Our foremost objective is to provide our customers with prompt, courteous customer service and the highest quality workmanship at a reasonable price. We bring honesty, integrity to every job and we have the highest regard for safety. Our services include: Interior / Exterior Repairs, Membrane Application, Window Wells & Down Pipes, Weepers & Parging, Drainage Systems. All jobs have full contract & warranty. We have over 25 years of waterproofing experience in the GTA. Call today for your free quote!

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Concrete Vector is a young and ambitious company specializing in high-quality concrete work and landscaping. We are passionate about what we do and committed to delivering expert craftsmanship, durable solutions, and professional service. Our team works efficiently to complete every project on time and at a fair price. Customer satisfaction is our top priority, and we go the extra mile to ensure every job meets the highest standards.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    As a professional construction company, our primary focus is to deliver outstanding workmanship and exceed client expectations in terms of quality, timeline, and budget. Our team of experienced professionals is dedicated to providing our clients with a smooth and seamless construction experience. We take pride in our approach to each project, and our staff is trained to maintain the highest level of professionalism, courtesy, and respect. This includes taking care to maintain a clean and safe work environment and adhering to strict safety protocols to ensure the well-being of our workers and clients. We understand the importance of staying informed on the latest industry standards, regulations, and guidelines, and our work is informed by a thorough knowledge of relevant building codes and safety regulations. We are dedicated to staying up-to-date with the latest industry developments and continuously improving our processes to ensure that our clients receive the best possible service. General Contracting Underpinning, Basement structural repairs Renovations, Design & Build

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    With over 15 years of hands-on experience in concrete finishing, masonry, painting, and general construction, we proudly serve homeowners and businesses across Toronto and the GTA. Our services cover a wide range of needs: Concrete Work: Driveways, walkways, patios, basement floors, shed pads, and decorative finishes. Masonry: Brick and stone repairs, parging, block work, interlocking, and restorations. Painting: Professional interior and exterior painting for homes, condos, and commercial spaces—clean finishes, modern looks, and lasting quality. What sets us apart is our dedication to craftsmanship, attention to detail, and customer satisfaction. We offer free estimates, competitive pricing, and clear communication throughout every project. No job is too small or too large—we approach each one with the same professionalism and care. If you’re looking for reliable, skilled, and trustworthy service for your next project, we’re here to help make your vision a reality.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    🛠️ Extensive experience in home renovations and various construction projects ✅ Enhancing interior spaces with creative ideas 💯 Delivering professional workmanship with outstanding results 💰 Fair pricing for top-quality work 🏆 Client satisfaction = Business growth and success

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are a professional home services company specializing in plumbing, handyman services, and painting, serving homeowners, landlords, and property managers who expect work done properly, safely, and with attention to detail. Our approach is simple: diagnose accurately, communicate clearly, and execute to a high standard. We don’t rush jobs, cut corners, or leave clients guessing. Every project—whether a minor repair or a larger improvement—is handled with the same level of care and accountability. Plumbing Services We provide a full range of residential plumbing services, including leak detection and repair, drain issues, fixture installations and replacements, water heater work, and troubleshooting complex plumbing problems. We focus on identifying the root cause of issues, not temporary fixes, and we complete work in compliance with applicable codes and best practices. Handyman Services For homeowners who want one dependable professional instead of multiple contractors, we offer skilled handyman services for repairs, installations, and light renovations. From doors, fixtures, and hardware to general home maintenance, our work is clean, precise, and built to last.

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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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