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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

    General Contracting

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    At RenoBlue, we believe every renovation should start with confidence, not stress. Founded in Toronto, we’re changing how homeowners find trusted contractors—through rigorous vetting, local expertise, and transparent matching.  RenoBlue connects homeowners with up to 3 of the top contractors in Canada. Our network of professionals boasts a +4-star rating on Google with verified reviews, $2MM liability insurance, WSIB, and a 1-year warranty.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    YEARS OF EXPERIENCE Our team has over 20 Years of Experience working on home projects across the GTA. We will treat your home like a work of art and every project will be finished with the utmost quality and care! QUALITY MATERIALS We pride ourselves on using only the highest quality materials meaning that your home projects will endure all kinds of weather! CERTIFIED IN SAFETY From heights, to speciality materials, our team has a range of certifications for various needs. You can be confident that safety is one of our fundamental values! Give us a call - (416) 230-6285

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    TerraLuxe General Contracting is a trusted full-service contracting company dedicated to delivering high-quality craftsmanship and smooth, stress-free project experiences. We specialize in residential and commercial construction, offering services including renovations, remodels, additions, custom builds, exterior improvements, and general repairs. With a focus on reliability, clear communication, and premium workmanship, TerraLuxe General Contracting brings your vision to life with precision and care. Whether it’s transforming a single room or managing a full-scale construction project, we ensure every detail meets our high standards. At TerraLuxe, we combine modern building practices with a client-first approach — creating durable, beautiful spaces built to last. Contact us today to get started on your next project.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    I have over 4 years of experience in legal plumbing, specializing in leak detection, repairs, and a wide range of residential and commercial plumbing services.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Hello there I am full time available to do any kind of general contacting work residential and commercial. Providing services in GTA in a reasonable price.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    SD Concrete is a trusted concrete contractor serving Brampton, Mississauga, Caledon, Toronto, and surrounding areas. We specialize in residential and commercial concrete services, delivering durable, high-quality workmanship with attention to detail. Our services include: * Concrete driveways * Walkways and sidewalks * Patios and concrete pads * Stamped concrete * Garage floors * Concrete curbs and steps * Concrete repairs and resurfacing * Exposed aggregate finishes At SD Concrete, we are committed to providing reliable service, competitive pricing, and professional results that enhance the beauty and value of your property. Customer satisfaction is our top priority, and we take pride in completing every project on time and to the highest standards. Free estimates available. Contact SD Concrete today to discuss your next project.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    From rough-in installation to final fixture setup! Need plumbing repairs in a hurry? Need to install a new bathroom? Whatever your plumbing needs, our team of local Toronto plumbers at Alex's Team Plumbing are here to help. We're a locally owned and operated plumbing company, so we're proud to offer top-notch plumbing services to our customers in Toronto and the GTA area. We'll get the job done right, no matter what it takes. -Interior waterproofing (weeping tile, sump pump systems) -Exterior waterproofing (excavation, membrane installation, drainage) -full basement plumbing - faucet installation - garbage disposal installation - shower installation - Camera Drain Inspection - Sump Pump installation - Backwater Valve installation - Drain Cleaning - Well Pump Services - hydronic heating system - and many other drain and plumbing services -Custom Home Plumbing -underground rough-ins

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    OUR SERVICES Residential & Commercial •Interlocking •Concrete •Jewelstone •Flagstone •Waterproofing •Drainage •Excavations •Fences •Sod •Wash & Seal •Tree & Stump removal •Armour stone •Retaining walls •Artificial turf •Asphalt Sealing •Pergola •Egress window •Walkout entrance •Pools •Waterfalls & Ponds •Masonry brick & Stone •Stone Veneer •Bollards •ICF Superform ( pools & foundations) •Excavation services

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    I enjoy fixing things and bringing customers dream projects come to reality

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Nia Coatings Group is a GTA-based specialist in premium epoxy and polyaspartic floor coatings for residential garages, basements, patios, and commercial spaces. We use industrial-grade diamond grinding equipment for proper surface prep — the single biggest factor in how long a coating lasts — and apply systems engineered for Ontario's freeze-thaw cycle. Polyaspartic systems give homeowners a 1-day turnaround: park your car back in the garage the same evening. We coat to commercial-grade thickness, not the watered-down kits you find at big-box stores. Every project includes a written warranty, fixed pricing, and a no-pressure quote. Serving Mississauga, Oakville, Burlington, Milton, Brampton, Etobicoke, and West Toronto. Owner-operated — you talk to the person doing the work.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are a quality homebuilder with 20 years experience. We specialize in all large renovations, custom homes, backyard dwelling units, multiplex's, additions, legal basement apartments, commercial projects, architectural drawings, permits, city consultations and all other construction needs. Come to our office or call us anytime to arrange a free consultation or estimate!! Referrals available on request, check out our website at NEW CUSTOM BUILDS .CA Talk to you soon! New Custom Builds is a registered company and is owned and operated by MANDEVILLE DEVELOPMENTS INC.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Hi, I’m huthaifa, a skilled and experienced handyman serving the Greater Toronto Area. Whether you need furniture assembly, home repairs, painting, plumbing fixes, electrical work, or general maintenance, I’ve got you covered!

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Contact us for any kind of residential work we are verified and provide all the residential needs and services including electrical framing washrooms kitchen cabinets floors legal basements all of the residential work

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are a group of professionals ready to repair or install new of all types of construction.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

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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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