Top 10 best waterproofing companies in Toronto

A home leakage is one of the most severe troubles. The consequences of a leak are very difficult and expensive to fix. Increased moisture in the basement leads to mold, mildew, and fungus and provokes foundation damage. A house that has not received quality waterproofing is constantly threatened with structural integrity failure. To avoid problems and ensure the safety of the building, you need to ensure quality basement waterproofing by choosing one of the 10 most reliable home waterproofing companies in Toronto.

Short on time? We have compiled a quick overview of the leading contractors to help you compare their key advantages at a glance.

Quick Comparison: Top Waterproofing Contractors in Toronto

To help you make the right choice, we evaluated Toronto waterproofing companies based on:

• Services: Ability to handle both exterior and interior waterproofing, sump pumps, and crack repairs.
• Licensing & Insurance: Fully licensed and insured to work in the GTA.
• Warranty: Minimum 20-year or lifetime transferable warranties.
• Reputation: Verified reviews on HomeStars, Google, and BBB.

How Much Does Waterproofing Cost in Toronto?

The price depends mostly on the method. Exterior basement waterproofing costs more because the crew digs down to the footing and seals the outside of the wall. Interior waterproofing stays inside the basement, so there is no excavation to pay for. Typical Leaquida prices for the most common jobs:

The final figure depends on the length of the foundation wall, excavation depth and access around the house. An on-site inspection gives the exact number for your home.

The best waterproofing companies in Toronto

The list of the best house waterproofing companies included those with an excellent reputation in the market and meeting the industry’s high requirements and standards. The evaluation and selection process also involved criteria such as the quality of work done and feedback from their clients. After carefully analyzing and researching all basement drying companies on the market, we have selected the 10 most responsible contractors that provide quality and reliable solutions.

Leaquida Waterproofing is a Toronto waterproofing contractor based in Etobicoke and serving the whole GTA. The company has more than 15 years of experience and backs its work with a 25-year warranty. Services cover interior and exterior basement waterproofing, foundation crack repair, sump pump and backwater valve installation, French drains and structural foundation repair.

Every job starts with a free on-site inspection to find where the water actually gets in. Leaquida also matches or beats competitor quotes for the same scope of work, so homeowners can compare offers without paying more.

RCC Waterproofing

RCC Waterproofing is a family-owned company that has worked in Toronto since 1920 and has completed more than 100,000 projects across Ontario. It won a HomeStars Best Of award in 2024 and has received 14 HomeStars awards in total.

Services include interior and exterior waterproofing, structural foundation repair and internal drainage systems. Every project comes with a transferable lifetime warranty. RCC also offers a price match guarantee and in-house 0% financing for 24 months.

City-Wide Group

City Wide Group is a family-owned waterproofing and underpinning contractor founded in 1961. The company has won the Consumer’s Choice Award for 29 consecutive years.

It handles interior and exterior waterproofing, foundation crack repair and underpinning in Toronto and the GTA, with projects in Hamilton, Niagara and Kitchener-Waterloo as well. Qualifying work is backed by a lifetime, fully transferable warranty, and flexible financing is available.

DryShield Basement Waterproofing

DryShield has more than 25 years of experience and works on both homes and commercial buildings in Toronto, the GTA and Southern Ontario. It is an 8-time HomeStars Best Of winner, holds an A+ BBB rating and carries $5 million in liability coverage.

Services include interior and exterior waterproofing, crack injection and mould prevention. Work is covered by a transferable lifetime warranty, and an online cost calculator on the DryShield website gives a first estimate before the inspection.

Royal Work

Royal Work is a family-operated company founded in 1998. It handles interior and exterior basement waterproofing, underpinning, sump pump installation and foundation repair across the Greater Toronto Area.

The team runs a 24/7 emergency service, so a flooded basement can be looked at the same day. Waterproofing work comes with a lifetime warranty.

Act Fast Waterproofing

Act Fast Waterproofing has more than 25 years of experience with basements and foundations across the GTA. The company does both interior and exterior waterproofing, along with crack repair, sump pumps, underpinning and basement lowering.

Its 25-year warranty can be transferred to an unlimited number of future owners. Act Fast holds an A+ BBB rating and offers a price match guarantee.

Need an honest quote immediately?

Leaquida Waterproofing provides free on-site inspections in Toronto and the GTA. We match or beat competitor quotes with superior workmanship. Get a Free Quote

Canada Waterproofers

Canada Waterproofers has served Toronto and the GTA since 1998. Its team includes licensed plumbers as well as waterproofing technicians, so drain repair, backwater valves and sewer work are handled alongside interior and exterior waterproofing and underpinning.

The company is fully licensed and WSIB-covered and received a HomeStars award in 2024. Completed waterproofing work comes with a lifetime warranty.

CD Basement Waterproofing

CD Basement Waterproofing is a family-owned waterproofing and foundation repair business in Toronto. It is an A+ rated BBB accredited company, fully insured and covered by WSIB.

Estimates are free and carry no obligation, and all work comes with a written guarantee. For homeowners who want to spread the cost, CD offers flexible financing, including 0% plans.

Direct Waterproofing

Direct Waterproofing has worked in Toronto and the GTA for more than 25 years. Along with interior and exterior basement waterproofing, the team handles foundation repair, sump pumps, drain snaking and backflow preventer installation.

Direct is WSIB-covered and a member of the Toronto Construction Association. Its waterproofing work comes with a 25-year warranty.

Aquatech Waterproofing

Aquatech Waterproofing has worked in Toronto and the GTA since 1996 and has completed more than 50,000 projects. It is a 10-time HomeStars Best Of winner and an A+ BBB accredited business.

Services include interior and exterior waterproofing, sump pumps, crack repair and underpinning. Aquatech gives a 25-year transferable warranty on its work and offers a price match guarantee.

AquaMen Waterproofing & Underpinning Inc.

AquaMen Waterproofing & Underpinning Inc. is a family-owned company headquartered in Mississauga. It covers external and internal waterproofing, crack sealing, sump pumps, crawlspace encapsulation and basement lowering, and all installers are AquaMen employees rather than subcontractors.

The company is WSIB insured, runs a 24/7 emergency line and gives a transferable 25-year warranty. The first estimate is free.

Final Thoughts

Waterproofing is one of the most important stages of organizing the basement. It aims to protect the entire house from the risk of waterlogging and foundation destruction. Excessive moisture in the basement can cause serious damage to the entire building and create pockets of biological activity on walls throughout the house. Water has a devastating effect on the foundation, gradually putting the building into disrepair.

If you notice even minor signs of water in the basement, have it checked before the damage spreads. When comparing contractors, look at the warranty, how long the company has worked in Toronto and whether it offers both interior and exterior methods.