Basement Underpinning

Many people would like to increase the livable space in their home but do not have the available lot space for a size able addition. Lowering your basement floor is a solution that can add additional height to an otherwise awkward area. Underpinning achieves a new :

  • Basement income Unit
  • Nanny Suite or Guest Suite
  • In-Law Suite
  • Additional Recreational, Entertainment and Living Spaces

Basement Underpinning Contractors Toronto

Lowering a basement is a process called underpinning, which involves extending your foundation walls to achieve a basement height of 8 feet or higher. As a result of this process we will waterproof your interior, install a new weeping system, install new drains- complete with back-flow prev enter; thus creating a complete walkout basement shell. We also ensure the customer is assisted throughout the renovations. Rock Bottom Underpinning provides services to facilitate homeowners with the permit process and necessary engineering/architectural drawings. We ensure that our clients are set up with exceptional professionals to make certain every project runs seamlessly.

Basement Finishing is a complicated project and should not be attempted without the help of a licensed and insured foundation expert. For over 35 years, Rock Bottom Underpinning has been a trusted name for professional basement underpinning, and we’ve built our reputation on providing comprehensive, affordable solutions that are customized to the unique needs of GTA homeowners. At Rock Bottom Underpinning we are known as the leading basement underpinning contractors in the industry. We aren’t just any contractor who provides underpinning services, we are underpinning specialists.

To learn more about our Toronto basement underpinning services and help you protect your greatest investment, give us a call today! You can also fill out our online form now to get started with a free, no-obligation estimate.

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Fully Insured Work

Our professional team is fully insured and has extensive experience, professional training
and a commitment to superior service

Why Choose Us

Rock Bottom Underpinning Truck

Our Values

Rock Bottom Underpinning provides exceptional service and a completely insured project for our customers. We are committed to providing the highest level of professionalism, service response, and quality workmanship. When working on your project, Rock Bottom Underpinning treats your most valuable asset like its our own!

Professional Team

We at Rock Bottom Underpinning have a team of well-experienced and qualified professionals. Our work is specialized and requires skills that not every companies’ employees possess. We are constantly going through specialty training and we always use high-quality tools, materials and equipment to create a professional finished product. Our employees are the foundation of our company and your home. Also, our list of trusted professionals extends beyond our company;
  • Structural Engineers
  • Architects
  • Mechanical Engineers
  • Heating and Air Conditioning partners
  • Electrical Professionals
  • Plumbing Specialists
  • Renovation Contractors
We have all of the support required to make sure your project is completed professionally, on time and on budget.

Trusted Local Company

We are proud of the reputation the Rock Bottom Underpinning has built over the years. We are extremely proud of the endless word of mouth referrals we continually receive from our valued customers. We are not just any regular contractor, renovation company, or excavation company. Underpinning is in our name, this is what we do, our name is what we stand behind! Rock Bottom Underpinning is the company you can trust to execute your project with expertise, professionalism, on time and on budget. If it's not in the name, think twice about who is underpinning your most valuable asset.


Dion and his crew completed our underpinning safely and on schedule. The price was competitive, Dion was responsive, and any small issues that came up along the way were dealt with professionally. We were very pleased and wouldn't hesitate to recommend Rock Bottom.

- Alex

After getting 3 quotes we decided to hire Dion and his Rock Bottom Underpinning team. Our basement height was under 6 ft and now is 8ft. Dion & his crew do excellent work, and kept us well informed through the entire process. His estimate of cost and time was right on the target.

- Derek

This was not our first renovation but it is our biggest one and we had been planning and saving for an overhaul of our century home for 3 years. We sourced out three quotes and Dion at Rock Bottom was not only the most affordable but we also had a gut feeling we could trust him from Day 1.

- Katie

Rockbottom’s workmanship, customer service, team and overall final product was excellent! The project consisted of a full underpin, new water service and sewer main, and a large/complicated back addition. Dion and Jamie were always easily accessible and ensured the project ran efficiently and to budget

- Naram

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


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