Trusted Basement
Underpinning Specialists

For more than 35 years, we have been providing top-quality,
comprehensive underpinning services in Toronto and the GTA.

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35 Years of Excellence

We are not Just any Contractor

We are Underpinning Specialists

Who we are

When it comes to basement underpinning, basement additions, in-floor heating or basement walkouts, it is important to get professional help. For more than 35 years, Rock Bottom Underpinning has delivered the highest quality services to those in Toronto and the GTA.

Our team of underpinning contractors in Toronto specializes in underpinning construction, basement additions, basement walkouts and in-floor heating, no matter how complex the job may be. We provide outstanding workmanship and exceptional service and have built our reputation on honest services our customers can trust.

Our licensed and insured team strives to do their jobs with the utmost excellence and professionalism. We’ll make sure that your project runs smoothly and seamlessly. Our team gets in, gets the job done, and gets you back to your life!

Rock Bottom Underpinning Van

We Can Help You With

At Rock Bottom Underpinning, our team has more than 35 years of experience in
helping customers just like you tackle problems of all sizes.

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.

Underpinning and benching are the easiest ways to add instant value to your property by adding extra square footage to your existing home. Downtown living has its benefits, but usually spacious houses and lots of acreage are not synonymous with downtown homes. This is where Rock Bottom Underpinning comes in to help.


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


Our Insurance Partner



Bild Calgary Member and Ontario Home Builders Association