Toronto's Basement Underpinning Specialists

Building Stronger Foundations.
Creating Better Homes.

Rock Bottom Underpinning is Toronto’s dedicated basement lowering specialist. We transform low, underutilized basements into full-height, structurally sound living spaces increasing your property value, usable square footage, and income potential.

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15+

years of experience

1,000+ Projects

Successfully Completed

10-Year Warranty

Workmanship Guarantee

Fully Licensed & Insured

Professional & Code Compliant

Who We Are

Toronto's Basement
Lowering & Underpinning Specialists

At RockBottom Underpinning, we specialize in transforming older homes by creating safe, full-height basements through expert structural underpinning and foundation solutions. Serving homeowners throughout Toronto and the GTA, we help unlock the full potential of your property by increasing usable living space, strengthening existing foundations, and preparing homes for legal secondary suites and modern renovations.

With decades of combined industry experience, our team delivers engineered solutions with precision, professionalism, and an unwavering commitment to quality. From initial consultation and permits to excavation, structural reinforcement, waterproofing, and final concrete work, we manage every stage of the project with safety, transparency, and attention to detail.

Whether you’re expanding your family’s living space, increasing your home’s value, or creating a rental suite, RockBottom Underpinning provides the expertise and craftsmanship to build a stronger foundation for your future.

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On Site — Toronto Basement Lowering Project

On Site — Toronto Basement Lowering Project

Our Services

Basement Underpinning

Expert basement underpinning solutions designed to increase ceiling height, reinforce your structure, and add long-term value to your home.

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Basement Walkouts

Basement Additions

Basement Renovation

Waterproofing

In-Floor Heating

Structural Beams

Building Permits

Our Work

Featured Projects

01  /  01
Albemarle Ave, toronto

Albemarle Ave, toronto

basement underpinning

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4ft

Original

8ft

Final

1922

Year Built

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Junction

Dovercourt Rd, Toronto

Underpinning

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High Park

Dundas St, Toronto

Basement Renovation

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Lawrence Park

Golfdale Rd, Toronto

Underpinning

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The best service I ever got. The owner of the company came in person before and after the job was done. Great customer service. The job was done fast and the best quality. Very impressive. I would recommend anyone who needs job done fast and headache free. As a side note the payment process was all automated. That part was also fast. Unbelievable. I will definitely contact for my next project. Thank you!

Nadia Shykula

/ Google Reviews

Our older, lower (6′), mostly finished basement needed to be expanded to allow for an elderly family member to join our household. Rock Bottom came recommended by a friend of a friend and did not disappoint. The price was competitive (but not cheap) for gutting the basement, taking our floor down to get us a finished height of 8′ with new drains, sump pump, backwater valve and hot water heating pipes with manifold. The team was always punctual (6 days a week), always cheerful, and highly effective. From start to finish their work took 5 weeks (the estimate was 4-6). Our GC noted how rare that is with underpinning work, and a builder friend noted the quality of the floor’s finished surface. Additionally, our semi-detached neighbour’s basement is almost finished (the team is still punctual, cheerful and effective).

Matthew Cole

/ Google Reviews

Rock Bottom renewed my faith in contractors. They were unbelievable responsive, available to answer all of my questions at every step. The crew was early every day and put in long hours to get the job as quickly as possible. There were a couple of surprises discovered when they dug down and none of it impacted the price I paid. The crew was friendly, happy, and incredibly hard-working. I cannot recommend Rock Bottom highly enough. I’d hire them again in a heartbeat. I’m thrilled with my new basement!

Charlie G

/ Google Reviews

Excellent service and workmanship. Personnel was very knowledgeable and accommodating with schedule updates. Project was on time and on budget which is all you can ask for

Paul

/ Google Reviews

So happy we chose rock bottom for our underpinning project. The team was amazing and did an incredible job. Throughout the project they were in constant communication with us and when they were finished, left the site in perfect condition.

Joshua S.

/ Google Reviews

Ready To Transform Your Basement?

Schedule a no-obligation assessment today! We’ll evaluate your foundation, discuss your goals, and provide a clear understanding of what’s possible.

Or call us directly

416-546-3558