GJ MacRae Foundation Repair

The Original Wetbasements Experts – Since 1975

Our History

Servicing Toronto, Mississauga, Oakville, Burlington, Milton, Hamilton and Georgetown

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Who is GJ MacRae Foundation Repair?

GJ MacRae is a second-generation, family-run, full-service basement foundation repair and waterproofing company serving the Greater Toronto Area since 1975. After nearly 50 years in business, we have established ourselves as the premier basement waterproofing company in the GTA. We will work with you to understand your project needs and find the best solution for damaged foundation walls or leaking basements.

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If you’re from the Greater Toronto Area and need exceptional basement waterproofing services, count on us for leading foundation repair in Toronto. With nearly five decades of experience, we specialize in foundation repair and basement waterproofing, ensuring the long-term security of your home’s concrete foundation walls. Our reliable exterior and interior waterproofing solutions come with the best warranty in the business and are offered throughout the GTA, including Oakville, Mississauga, Burlington, Hamilton, Milton, Georgetown, and Scarborough. Operating year-round, even in the winter, we provide timely basement leak repair services to safeguard your home from sudden leaks or foundation damages. Our experience of nearly 50 years gives us confidence in our ability to deliver a dry, usable basement to protect your home’s foundation for the long run, so contact us today for a free estimate.


The MacRae Clan in the Early Years

During the early years when residential basements were mainly used for coal and food storage (and the occasional hogmánay), we were one of the first contractors in the Toronto area to realize the incredible benefits of a fully dry, entirely usable basement.

1970 – 1975

The Seed Is Planted

“As dearcáin bheaga a fhásann na crainn is airde: mighty oaks from little acorns grow”. John MacRae begins specializing in below grade concrete waterproofing projects with his father.
1970 – 1975

1975 – 1985


Noreen and John MacRae welcome three children into the world and although times were tough in the early years they always found a way to make ends meet. GJ MacRae slowly begins to gain traction.
1975 – 1985

1985 – 1995

The Next Generation

The kids become involved on the weekends helping Dad clean up job sites while they study and nibble on timbits. Gavin shows a keen interest in masonry and the seed continues to grow.
1985 – 1995

1995 – 2000

A New Century

GJ MacRae becomes a full service foundation repair company specializing in basement waterproofing, structural foundation repair and underpinning. The kids work with the crews during the summer and the collective interest continues to expand.
1995 – 2000

2000 – 2005

The Transition

More specialized projects become attractive as our expertise and experience grows. Platon replaces tintest, weeping tile detail changes within the OBC, John transitions to sales and Gavin starts his first full time crew.
2000 – 2005

2005 – Present

Five Decades Later!

Nearly 50 years have passed and the mighty oak still grows! GJ MacRae continues to set the bar in all phases of below grade waterproofing, structural foundation repair, underpinning and heritage restoration.

2005 – Present

1985: Brand New Truck

Back then, pickup trucks were much rarer than today, so our first new pickup truck was an exciting accomplishment for our family!

1993: Noreen and John

Noreen and John in the mid 1990’s in their new home in Orangeville! Every week felt like an adventure in these days!

1981: Early Connections

A reference from Bob Patterson of CFRB (now Newstalk 1010 / Bell Media). It was an excellent opportunity for John in the early years.

1988: The Kids Keep Growing

The kids grew up in these old pickup trucks and were always excited to play in them with Dad after a long week on the job site.

1975: Out Of Town Projects

Ottawa’s Carleton Place contracted John MacRae and his brother Don MacRae for many fulfilling years of reliable repairs and service.

1976: Carleton Town Hall

Another trusted repair by John and Don MacRae on the Carleton Place Town Hall. Referrals have always been an integral part of our success.

LOCAL repairs near you

What Does quality Foundation Repair Look Like?



Why Choose Us For Your Foundation Project?

Years of consistent service and warranty excellence have allowed GJ MacRae Foundation Repair to stand the test of time. With over 10,000+ warranties issued to date, no other company in the GTA is more qualified to complete your foundation repair project than we are.


The Full Spectrum Experts

GJ MacRae is one of the few foundation repair companies in the GTA that complete all phases of waterproofing, underpinning, and structural foundation repairs.


Meticulous Hand Excavation

Residential hand excavation is our specialty. We provide a low-impact hand excavation method to return your grounds to their original state.


Family Owned and Operated

Since 1975, we have been an active family owned and operated foundation repair, basement waterproofing, and underpinning company, and our reliability in the industry is widely recognized.


Details, Details, Details

GJ MacRae sets the bar high for attention to detail. Our team goes above and beyond to ensure precision in every aspect of our work. Trust us to deliver unparalleled quality and expertise that exceeds your expectations.


Knowledge, Passion, Longevity

We’re not general contractors, drain contractors, plumbers, or landscapers. Foundation repair is all we do, period. Let our experience and expertise protect you and your home long-term.


Most Dependable Warranty

Surpassing 10,000+ issued warranties and spanning nearly half a century, no other foundation repair or basement waterproofing company in the GTA has been doing it better for longer.


Some Kind Words From Our Customers

Maria Aleman
Maria Aleman
Dean, came out right away after we noticed water in our basement and provided an estimate. Communication with him was easy and he answered all my questions. Work was done within the week. I had a great experience and will recommend to others.
Jakob Backstrom
Jakob Backstrom
Gavin and his team did a great job. Right from quoting the job I had confidence they can do the job well and had the experience. Great videos on their website really help you understand what’s involved in foundation repair.
Job was done in 2 days which I was amazed it could be done that quickly! That’s a lot of pails of concrete and rock that had to be shuttled in and out of the house! The guys were all very friendly and let me know everything that was being done and answered all my questions! The bowed wall looks solidly supported now with carbon fibre strapping and the water found beneath the floor is now being safely routed through newly installed Plastic Weeper to our sump. We now have peace of mind that we can finish the basement with no leaks or crumbling walls! Thankyou Gavin, Maggi, Ricardo and Jay!
Debra Gold
Debra Gold
We would like to express our gratitude to G.J. McRae for the exceptional job they did in restoring our peace of mind. Every time it rained or snowed, our basement would leak, causing us great distress. However, the crew from G.J. McRae arrived promptly, worked diligently, and efficiently resolved the issue. They even left our backyard in excellent condition, cleaning up after themselves. We cannot thank you enough for the outstanding service and for making us feel confident that the problem is now completely resolved. We are so happy to be able to not worry about this any longer.
Tricia LaDouceur
Tricia LaDouceur
Workers were on time and professional. Quality and value for money. My only issue was the concrete poured was a little uneven causing a small lip near the drain. We managed to smooth it out. Would highly recommend GJ MacRae Foundation Repair.
John Prostran
John Prostran
Very happy with the work done by the GJ Macrae team. Recommend them to anyone for the quality of their work and the amazing warranty, that provides a piece of mind, that they have.
Jane Ingman
Jane Ingman
Everything went smoothly with the work we had down by GJ MacRae. Our issues included masonry stair repair, foundation cracks and parging that badly needed replacement. The resulting process was a look that exceeded how the house looked when it was first built. The quoting process and communication with Dean was very professional and timely. The onsite crew was very tidy and quick. I would not hesitate to recommend!
Jay Murray
Jay Murray
Our window well was backing up. The crew came in hand dug down over 8 feet. They put in proper drainage and moisture protective membrane the area. Filled everything back in and made it look better than it was. 100% recommend using them again. Thanks you for all the work
John T
John T
Gavin and his team were able to sort out a couple of VERY strange basement leaks after a renovation by others. Their detective work took into account the odd symptoms and they were able to resolve the issues permanently at a reasonable price. The cleanup afterwards was excellent – an important feature for us – as it demonstrates the overall workmanship. You may need to wait a fair amount of time for a response to emails if your issue is non-urgent / small job.

Expert Waterproofing Services for Your Home

GJ MacRae Foundation Repair has been the industry leader for reliable basement waterproofing in the Greater Toronto Area Since 1975. Nearly five decades of experience inform our proven multi-stage repair process based on below-grade drainage considerations that allow us to waterproof concrete blocks, poured walls, and stone rubble foundation walls properly for the long term. Our repair solutions for leaking foundation cracks include using bitumen-based barrier membranes and high-efficiency weeping tile systems, which give us the edge in reliability and allow for the most robust foundation repair warranty available today in the GTA. Experience the GJ MacRae difference for year-round basement leak repairs in Toronto, Oakville, Mississauga, Burlington, Hamilton, Milton, and Georgetown. If you spot cracked foundation walls, leaky foundations, or any other basement waterproofing issues in your house, reach out and call us today at (905) 824-2557.

Quality Foundation Repair Done Right.


Download Our Free eBook

We’re honored to provide these resources to help you on your journey, and we know reputations are hard to build and easy to lose. That’s why our business is built around two simple promises:

Honesty and Transparency.

We genuinely want each step of your journey (from the very first Google search to a leak-free basement) to be positive!

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