The GTA's Highest Quality Foundation Repair And Basement Waterproofing

GJ MacRae Foundation Repair is an award winning second generation family run basement waterproofing, foundation repair and underpinning company serving the Greater Toronto Area.

With over 10,000+ satisfied customers to date see what the
GJ MacRae difference is all about!

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GJ MacRae Foundation Repair is an award winning second generation family run basement waterproofing company with over 10,000+ satisfied customers to date!



Best In Class Hand-Excavated Basement Waterproofing in Greater Toronto Area

Whether you live in Oakville, Hamilton or Downtown Toronto, the Greater Toronto area sees its fair share of rain and snow. That factor, amongst others, can lead to the buildup of groundwater and its attendant hydrostatic pressure that forces water through concrete foundation cracks, damaged concrete foundation walls and damaged weeping tile systems and allows water to enter straight into your basement. These concerns demand careful waterproofing and drainage considerations that are rarely implemented in residential structures during original construction. This is where GJ MacRae Foundation Repair, the leading basement waterproofing company in Toronto, can help.

A dependable basement waterproofing system is crucial for safeguarding your home’s foundation and creating a safe living space. We have been providing foundation repair and basement waterproofing solutions since 1975 and have established ourselves as the leading industry specialists thanks to our experience and industry-leading structural repair methodologies. We use cutting-edge technologies and the latest practices to ensure a complete makeover of your basement. We have been providing top-notch foundation repair & basement waterproofing services around Greater Toronto for nearly 50 years. We offer a wide range of services, and our workmanship is second to none, backed by our highly skilled and experienced staff and modern toolset. We are a second-generation family-owned business and value quality work and customer satisfaction above all.

With extensive industry knowledge and experience, basement waterproofing experts at GJ MacRae Foundation Repair in the Greater Toronto Area deeply understand homeowners’ specific challenges. Whether it’s a leaky foundation, damp walls, or moisture problems, we have the expertise to deliver tailored solutions that meet every client’s needs. Staying at the forefront of technological advancements, we consistently offer reliable, long-lasting results so homeowners throughout the Greater Toronto Area can resolve their waterproofing related issues stress free.

Who We (GJ MacRae Foundation Repair) Are?

GJ MacRae is a family-owned and full-service operated basement foundation repair and waterproofing company serving the Greater Toronto Area since 1975. We have come a long way from 1975 to the present, as we have established ourselves as one of the industry-leading basement waterproofing companies in Greater Toronto  and we will work with you to understand your needs and find the best solution for your damaged foundation or leaking basement.

Whether you live in Oakville, Hamilton or Downtown Toronto, GJ MacRae is Greater Toronto’s Outstanding Basement Leak Repair service. We provide foundation repair and basement waterproofing services to secure your foundation in for years to come. Bringing decades of experience to every foundation repair project, we offer some of the most reliable exterior and interior basement waterproofing solutions backed by the most reliable warranty in the business.

We offer foundation repair and basement waterproofing services in all of the major Greater Toronto areas, including Oakville, Mississauga, Burlington, Hamilton, Milton, Georgetown, and Scarborough. We offer basement leak repair services throughout the year (even in winter), so you’ll never be caught unprepared by a sudden downpour or flash thaw. We are confident we can help you achieve a dry, usable basement and in the process protect your home for the long run. Contact us today for a free estimate.

What Makes GJ MacRae Foundation Repair the Best Basement Waterproofing Company in Toronto


Decades of Experience

Trust the experts with almost five decades of experience in providing basement waterproofing services. 

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Serving the GTA

We have been Servicing Toronto, Etobicoke, Mississauga, Oakville, Burlington, Milton, Hamilton and Georgetown.

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Outstanding Service

Home of the original transferable warranty. Licensed specialists in basement waterproofing and underpinning.

family owned water proofing company

Completely Family Owned

Family owned and operated since 1975. Robust liability insurance, WHMIS trained, fully licensed, insured and bonded.

wide range of services

Wide Range of Service

From foundation repair to sump pump installation, we have a solution for all your basement waterproofing needs.


Quality Workmanship

We take pride in delivering the highest quality workmanship, ensuring your basement stays dry for a lifetime

Our Industry Leading Foundation Repair and Basement Waterproofing Services, Since 1975

Say goodbye to leaky basement as we specialize in basement waterproofing services for below grade concrete block, poured concrete, field stone and rubble stone foundation walls. With over 48 years of service in the GTA, get a dry basement backed by the most reliable warranty in the business and see what the GJ MacRae difference is all about.

Is there a crack in your poured, block or rubble stone foundation wall and is this crack allowing water to leak into your basement? Why do interior crack repair methods simply not work? Trust the experts and see why GJ MacRae Foundation Repair carries the most reliable foundation crack repair warranty in the business.

A century old technology; reborn! Our services also include interior and exterior weeping tile systems coupled with deep insights and experience relating to all things drainage. Ask us the difference between interior and exterior drainage methods and enjoy the benefit of our expertise!

Basement windows are a great source of natural light and can also act as a designated fire escape, but what happens when window wells begin to deteriorate, clog and leak? Our hand excavated exterior window well repair solutions are permanent and allow for unimpeded drainage all year long, guaranteed.

Sump pumps and sump basins are an integral part of all below grade drainage strategies due to their simplicity, reliability, low cost and proven effectiveness. Ensure your sump pump, basin and battery backup system are well maintained and ready for the next big rain or thaw.

We specialize in basement waterproofing services for below grade concrete block, poured concrete, field stone and rubble stone foundation walls. With over 48 years of service in the GTA and backed by the most reliable warranty in the business and see what the GJ MacRae difference is all about.

Are your foundation walls spalling, eroding or fragmenting? Is this damage accelerating through the years? Stopping moisture penetration through your above grade concrete structure is imperative. We offer brush parging, s-type, adhesive, mesh, fiber and thermal-slurry solutions for a lasting barrier.

GJ MacRae are pioneers of the overflow underpinning method in the Greater Toronto Area. Our underpinning process allows for safe, reliable vertical increases in basement ceiling height that can turn crawl spaces into full living quarters; and all for less than a standard second story addition.

When your foundation walls begin to show signs of cracking or bowing it is generally an indication of severe exterior lateral pressure from tree roots, hydrostatics or poorly draining soil. Click here to find out more about our full line of carbon fiber foundation reinforcement applications.

Why People Choose GJ MacRae?

When protecting your foundation walls and basement from water damage, choosing GJ MacRae Foundation Repair for basement waterproofing in Toronto ensures you receive top-notch service and reliable solutions that will safeguard your home for years to come.


Great Customer Service: Customer satisfaction is the main priority of GJ MacRae. We work with you to understand your needs and find the best budget solution. We can answer any questions and support you during the waterproofing process.

Comprehensive Services: Homeowners can find every basement waterproofing solution under one roof, saving time and effort. From foundation crack repairs to exterior waterproofing and weeping tile installations, we have the expertise and resources to address your waterproofing needs from start to finish.

Extensive Experience: With decades of experience in the business, GJ MacRae has earned a solid reputation for delivering long-term basement waterproofing solutions. We can tackle even the most challenging waterproofing projects with confidence and expertise.

Competitive Pricing: GJ MacRae offers competitive pricing for their basement waterproofing services without compromising quality. We provide transparent and fair pricing, ensuring homeowners receive the best long term value.

Expertise: GJ MacRae uses the latest waterproofing techniques and high-quality materials. We are experts in all types of basement waterproofing. We offer innovative solutions that provide long-lasting protection against water infiltration.

What Does Foundation Repair Look Like?

When Should you Hire a Basement Waterproofing Company in Toronto?

When protecting your foundation walls and basement from water damage, choosing GJ MacRae Foundation Repair ensures you receive top-notch service and reliable solutions that will safeguard your home for years to come.

Frequent Water Intrusion

If you consistently notice water pooling in your basement or wet spots on the walls or floor, it's a clear indication that you need basement waterproofing. A professional Toronto basement waterproofing company can identify the source of the problem and provide appropriate solutions to prevent further water damage.

Cracks in the Foundation

Visible cracks in the basement walls or foundation are potential entry points for water. Ignoring these cracks can lead to significant structural damage over time and its a good idea to have your foundation waterproofed. Reaching out to a reputable waterproofing company will help to prevent water from seeping in and causing damage.

Persistent Musty Odors

If you notice a persistent musty odour in your basement, it is likely due to excess moisture or water infiltration. These odours can indicate the presence of mould or mildew. Hiring wet basement experts to waterproof your basement can eliminate the moisture source, improving indoor air quality and creating a healthier living environment.

Preparation for Renovations

If you plan to renovate your basement or create a livable space, addressing any existing or potential water issues beforehand is crucial. A basement waterproofing company can assess the space, identify vulnerabilities, and recommend the necessary waterproofing measures to ensure a dry and comfortable living area.

Mould or Mildew Growth

The mould or mildew in your basement is a serious concern that requires immediate action. Mould not only compromises indoor air quality but can also cause health problems. A trusted basement waterproofing company can address the underlying moisture issue and implement effective measures to prevent mould growth.

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Expert Waterproofing Services for Your Home

Our company has been providing the most reliable basement waterproofing practices in the Greater Toronto Area since 1975, bringing decades of experience to every foundation repair project. Nobody likes a leaky basement and we know that the only proper repair for a leaking foundation crack is from the exterior of your house, and we use a proven multi-stage repair process based on below grade drainage considerations and a deep understanding of residential waterproofing envelopes. This can include the application of barrier membranes as well as repairs directly to concrete blocks, poured concrete foundation walls, rubble stone and field stone walls coupled with rapidly draining weeping tile systems that protect the foundation drainage envelope from failure. Plus, all of our drainage and waterproofing solutions are backed by the most reliable warranty in the business. After all, the only permanent solution to a leaking basement is the one that gets the job done right the first time.

Basement Waterproofing Services for Your Leaking Basement

When it comes to leaking basements, Toronto residents can rely on GJ MacRae Foundation Repair, as we are the best Toronto waterproofing company. We also service Oakville, Mississauga, Burlington, Hamilton, Milton, and Georgetown along with Toronto. Our basement leak repair services are available all year long (yes, even in the winter) and we ensure you will never be caught off guard by an unexpected rainstorm or flash thaw. If you discover water puddles in or around your basement or foundation walls, give us a call us at (905) 824-2557.


Joseph PastorJoseph Pastor
16:15 24 Jan 23
Excellent service from beginning to end. We would highly recommend this company. Dean assessed the problem (water leaking into our furnace room as a result of a window well that another company had incorrectly installed previously) and provided a thorough estimate detailing every aspect of the project. He then scheduled the job to be done before the big winter storm that had been forecast. The crew arrived exactly on time and completed the job, to the very best professional standard, in less than a day. We are so glad we chose G.J. MacRae. Thank you very much.
Lisa NeedhamLisa Needham
19:43 11 Nov 22
Amazing Service! GJ MacRae Foundation repair provided timely and superior quality service. Everything went exactly as planned from our initial consult and quote. Workers were on time, the quote was accurate and the work was high quality. We have a perfectionist contractor and he was incredibly impressed with Gavin and the team and he noted that the work was exceptional Inside and out on the project. The site was was clean and looked perfect when completed. Would highly recommend this service to our friends and family and others looking for this type of work! We can’t say enough good things and are so thankful!
16:24 11 Nov 22
Our second time utilising GJ MacRae Foundation; separate issues. Their professionalism and respect for their clients is highly commendable. Office team, sales and on-site crew all compliment each other.Highly recommend GJ MacRae Foundation company!
Kate PapadopoulosKate Papadopoulos
23:28 10 Apr 22
My fiancé and I can not say enough amazing things about GJ Mcrae. As first time home owners with water damage in our basement, GJ mcrae took care of everything so quickly and we’re extremely professional, reducing any worries we had. Would recommend this company over and over again. Dean was so easy with work with and continued to support us throughout the process. Thanks so much for the amazing job.
Adam DAdam D
19:38 11 Oct 20
We had GJ Macrae underpin our 1890s house in Leslieville over the summer. The team showed up on time every day, the project moved so smoothly. I wish I had another basement for them to underpin.Highly recommend GJ Macrae for any basement or underpinning work. The final result looks fantastic, we have a beautiful basement, with nice tall ceilings!The whole team was a pleasure to work with! 5 stars!


There are several factors that can cause a wet basement, including poor drainage, foundation cracks, leaks in pipes, and improper sealing of the basement walls or floors.

Common signs of water problems in basements include musty odors, mold growth, water stains on walls or floors, efflorescence (white powdery substance on the walls), and visible cracks in the walls or floors.

We offer a comprehensive range of basement waterproofing services, including foundation repair, basement crack repair, sump pump installation, exterior waterproofing, interior waterproofing and many more.

The cost of basement waterproofing depends on several factors, such as the extent of the damage, the type of waterproofing solution needed, and the size of your basement. We offer free consultations and can provide you with a quote once we assess your specific needs.

The timeline for a basement waterproofing project depends on the scope of the work. Some projects can be completed in a few days, while others may take several weeks. We will provide you with an estimated timeline during the consultation process.

In most cases, you will not need to leave your home while the work is being done. Our team will take steps to minimize disruption and maintain a safe and clean work area.

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After you fill out the form below, we will contact you as soon as possible for A FREE ESTIMATE. If you still have any questions, feel free to contact us anytime. 

Foundation Repair & Basement Waterproofing Toronto Blogs

What is a Weeping Tile and Do I Need One?

Everything About Weeping Tiles | Importance | Installation

Your home is one of your biggest and most valuable investments. Some homes are positioned in areas where the groundwater is likely to build up in the soil which can cause the water table to rise. What does this mean? It means that hydrostatic pressure can be created which pushes on the foundation walls and

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Why is Basement Waterproofing Important?

The basement is a versatile part of your house that can be used as a recreational space, storage room, or second family room. The area holds immense potential to be more than just a neglected or dull storage space. Your basement can be transformed into a lively space that not just makes it a useful

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Weeping Tile Vs French Drain: Which Is Better Suited for You?

Although a vital resource, water can be a nightmare for homeowners if their property and rooms are flooded. You might have heard horror stories about the water pool surrounding the ground or the basement filled with water to the point that the structure was permanently damaged. Poor drainage is the primary reason for this issue,