Kate Pona
Waterproofing and sump pump
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I called several companies for estimating fixing basement wall leak and getting rid of moisture. These guys gave me estimate right away during visit and recommended few things. They also helped us get city rebate. Recommend 5+
ALBO Renovations
ALBO Renovations
Underpinning contractors
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We have been working with Rock Basements for several years and contract them for underpinning projects. They do it all, waterproofing, cut outs, walkouts and do it pretty good!
Basement walkout & concrete
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Ivan estimated our walkout from basement with extra concrete work outside faster than everyone. He also helped us with revision of structural detail that saved us some money. Great overall service and finish wrok.
Working together
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Our company interacts with Rock basements on many jobs. We have been doing plumbing after them on many renovation projects and installing drain systems while they excavate basements. Its been easy and pleasant cooperation every time.
Davi C.
Back home addition
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this company did a great job with addition of our house. We hired them to excavate, do footings, foundation walls and concrete floor. This all happened so fast and we just continued from there with framing. Amazing to deal with and very responsive company.
Jenna K.
Basement underpinning
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our home in highpark had very low basement with old foundation walls. Everyone who came to estimate said it was complicated and gave us high price. Rock basements seemed very confident and easy going. It looked like it was a regular project for them and they completed underpinning within 5 weeks.
VeraLinea Design Studio
VeraLinea Design Studio
Basement lowering & additions
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Rock Basements is our go to company when clients ask for referring good rear addition or basement lowering company. We have referred them many times and our clients seem to be extremely satisfied with their work.
Josh L.
Full house waterproofing
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Rock did our home waterproofing with installing sump pump and water valve. Amazing work and i still wonder how they managed to do it only in 4 days.
underpinning with permit
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Everyone told us that getting permits is a nightmare after covid, but rock basements assured us they could do it only within 2 month. We were so surprised! and actual work lasted 6 weeks after permits. if anyone has doubts in them, than sop - they are great
Adam Vik
basement legal unit
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our architect suggested lowering basement by 2.5 feet so we could later apply for basement separate unit. Rock basements did just that within only a month. it was easy to work with and they explained all the details as they were working on footings and walls
Toronto Services

Foundation works and
Additions by Rock Basements

Underpinned Basements
Completed Concrete Jobs
Basements Waterproofed
Ongoing Projects

Lower Basement
Protect Foundation​

Underpinning: extend foundation walls down with excavating soil to increase basement ceiling height.

Excavation: Rock Basements can transform unusable crawl space or low height area into legal income unit!

Waterproofing: Protect Foundation walls from leaking and have dry basements for decades to enjoy.

Damp Proof: Install sump pump and backwater valve to prevent flooding and protect basement from incoming underground water.

Benefits of Working
With Us


Rock basements has been around for many years and have seen all types of basement underpinning and waterproofing projects. We are not afraid of complicated structural jobs that no-one wants to take.


Our company does only few types of work and all of them centered around basement foundation walls. Be it a waterproofing, concrete slab, basement walk out or underpinning.


We are what you call a true local company. We are located in Toronto are service clients almost around Greater Toronto Area. Our guys know type of homes, water tables and local bylaws.


Underpinning work in Toronto requires specific licenses to operate. Changing drain under concrete slab need license as well. We have all required documentation and insurance.

Rock Basements - Underpinning

When Can We Start?

Contact Rock Basements today for any Basement Underpinning, Waterproofing or Concrete Project in Toronto Area.

We can start large projects within a month. Smaller jobs can be scheduled 1-2 weeks ahead, depending on size and locates.

Architectural Service

Didn’t find anyone to help with permit and drawings to start underpinning?
Contact us!

Our team can make architectural drawings and help submit for city permit within several weeks of time.


After completing structural work for underpinning, our company provides warranty for all the work.

Basement lowering and walkouts warranties are up to 15 years and waterproofing warranty is 25 years of service.

Frequently Asked Questions

How long has "Rock Basements" been working in GTA

For over 10 years our company has been working in Greater Toronto Area doing basement lowering projects and other concrete works.

Prior to establishing a company, our project managers worded in similar fields as subcontractors or regular workers.

Every year we get more experience and knowledge on more complicated projects that City of Toronto offers to us.

Do you work with builders or only home owners as clients?

Rock Basements works with builders, contractors, home owners and even investors.

It does not matter to us who is the owner or main representative of the project. We want to perform and complete underpinning or waterproofing job within specified time.

Call us today for an estimate and get a competitive price for outstanding work.

When can you start our project?

Our team is capable of taking larger projects and starting them within 2-4 weeks.

Smaller jobs such as waterproofing or basement walkouts we can begin within a week if weather lets us.

Underpinning of basement and benching requires city permit, which clients typically do not yet have when contacting us.

This process alone may take up to 4-6 weeks, within which we can adjust our schedules and start as soon as permit is on hands.

How does estimation and agreement process work?

Before starting or even considering basement underpinning project, home owners want to know at least approximate costs.

On our website you can find information and basic calculator that helps budgeting for all types of jobs.

If that is not enough, our team can guestimate your work by phone with basic information of your house and underpinning details.

To get exact cost and proposal our representative needs to visit a job and have permit or drawings for structural work. With proposal drafted we agree on specific scope of work that is compensated to Rock Basements.

Are you waterproofing or underpinning company?

This is a question we do get asked a lot by our clients - "are you a waterproofing or basement underpinning company?". And we have to answer - Both.

We have brigades or teams that perform structural concrete work and are being sent out only towards basement lowering projects.

Also we have teams of 2-4 workers that only waterproof and damp proof basements in GTA.

Who should get the permit for underpinning and structural work?

For structural work such as basement lowering or addition of new walkout we definitely need permit to start the work.


We are able to assist in obtaining permit and even making architectural drawings necessary for being approved.

Often enough we are approached by clients that already have permits and we can take on the project with approved documentation. 

Regardless of who gets it our company is ready to assist and continue the work until its fully completed.

How big is your company?

Rock Basements has as low as 3 and as many as 12 operational crews, depending on season and business in Toronto.

Typically closer to to winter majority of waterproofing and basement walkout works are stopped or moved towards spring. We mostly perform interior work such as basement underpinning and other concrete projects.

During summer we expand and hire more people to be able to serve all clients in various types of work. In high seasons Rock basements can total 30 employees.

Which areas we serve for basement lowering and waterproofing?

Originally Rock Basements started in Toronto and now expended to entire GTA for basement waterproofing and underpinning projects.

As we say it has to make sense for company to travel large distance for specific jobs.

Typically we can travel up to 80 km away from Toronto for all types of work, but ask our project manager. Some material suppliers may not be as flexible as we are.

Can you help with permits, inspections and rebates?

Our team can help with all sorts of documentation for basement underpinning and waterproofing of foundation walls.

Architectural drawings and permit application may come with associated cost or as a deal with agreement for basement lowering.

Rebates and inspections are absolutely free and are assumed to be part of Rock Basements' work.

Reasons to work with Rock Basements for lowering project.

There are many companies and contractors in Toronto that can do basement underpinning projects or waterproofing of foundation wall but here is why working with us is better:

  • Inhouse documents - we can complete your architectural drawings and get permits fast
  • Turnaround - Rock Basements can start your project within weeks or days and complete it extremely fast
  • Experience - we have been many years on the market and have worked with many builders or clients. Our company is know to take on complicated jobs and deliver on time.