Top 10 Construction Companies in Canada 2026

Canada is building again, and we mean building on a massive scale.

Transit corridors, nuclear upgrades, power generation, healthcare facilities and data centers are all under construction right now. There’s plenty of work in the queue, and the companies winning the bids are carrying record order books. Aecon, for example, had a backlog of C$10.5 billion at the end of June 2026. PCL Construction posted US$9.9 billion in contracting revenue in 2025.

If you’re an owner, a developer or a public agency planning to build, this matters. The contractor you choose decides whether your project gets done safely, on time and on budget. It also plays a big role in how much risk ends up on your side of the contract.

Also Read: Top 10 Leading Architecture Companies in Canada 2026

There are many construction companies to choose from in Canada. Some are employee-owned giants that operate across North America. Others are family-run businesses with deep regional roots. A few have shares listed on the TSX and report every quarter.

We took the names that keep showing up in Canada’s leading industry rankings and dug into each one’s latest results, news releases and 2026 project wins. This guide covers the top 10 construction companies in Canada for 2026, what each one does best, and how to find the right fit for your next project.

Why Owners Rely on Canada’s Largest Construction Companies

Capacity for Megaprojects

Large transit, energy and hospital projects need bonding capacity, strong balance sheets and thousands of trades on call. The top 10 construction companies in Canada can staff several billion-dollar jobs at once, often by forming joint ventures with other contractors to spread the risk.

Experience With Alternative Delivery

Many public projects in Canada now run on public-private partnerships (P3s), progressive design-build or alliance contracts. The leading contractors have teams that know these models well, from early pricing through to long-term maintenance obligations.

Safety and Workforce Depth

Good safety records keep workers safe, and they also keep jobs on schedule and insurance costs down. Big builders can put more into training, field supervision and craft labor programs than smaller firms usually can.

Self-Performed Work

Many of these companies self-perform key parts of their work, whether it’s concrete, civil works or mechanical and electrical scopes. That gives you as an owner more control over quality and schedule than a model that subcontracts everything.

Top 10 Construction Companies in Canada at a Glance

Top 10 Construction Companies in Canada (2026)

Here’s our ranked list of the top 10 construction companies in Canada for 2026, based on scale, current backlog, project record and momentum.

1. PCL Construction

Founded in 1906 and headquartered in Edmonton, Alberta, PCL Construction is made up of independent companies operating across Canada, the United States, the Caribbean and Australia, with a presence in more than 30 major centers. PCL is 100% employee-owned, which keeps decision-making close to the people who build.

PCL reported US$9.9 billion in contracting revenue for 2025, up from US$8.3 billion in 2024. It was ranked No. 14 on ENR’s Top 400 Contractors list for 2026. Recent work includes the modernization of the Los Angeles Convention Center and a mass timber student housing tower in Denver. PCL has also been named one of Fortune’s 100 Best Companies to Work For 17 years in a row.

Key Construction Solutions
✔ General contracting and construction management
✔ Civil infrastructure and heavy industrial work
✔ Progressive design-build and P3 delivery
✔ Mass timber and sustainable building

Best for: Owners who want a top-tier general contractor for large, complex buildings and civil works.

2. Aecon Group

Aecon Group‘s roots go back to 1877, and it’s listed on the Toronto Stock Exchange (TSX: ARE). It operates in civil, urban transit, nuclear, utilities and industrial construction. It also holds stakes in infrastructure concessions, including the Gordie Howe International Bridge.

Aecon posted record revenue of C$5.43 billion in 2025, up 28% from 2024. Its second-quarter 2026 revenue rose 25% to C$1.63 billion, and backlog stood at C$10.5 billion as of June 30, 2026. The Gordie Howe International Bridge, in which Aecon holds a 20% interest, opened to traffic on July 27, 2026. Aecon later added its C$1.7 billion share of the Greenlight Electricity Centre in Alberta to backlog. Other current work includes the Scarborough Subway Extension, the Pickering refurbishment and the Darlington New Nuclear Project.

Key Construction Solutions
✔ Nuclear refurbishment and new nuclear
✔ Light rail, subway and highway construction
✔ Power generation and utilities
✔ Infrastructure concessions and P3s

Best for: Public agencies and utilities delivering major transit, energy and nuclear programs.

3. EllisDon

EllisDon started out in 1951 as a four-person contracting company in London, Ontario, and its first project was a three-room public school. Now based in Mississauga, it’s 100% employee-owned, with more than 10,000 salaried and hourly employees working across Canada, Europe, the United States and the Middle East.

EllisDon turned 75 in April 2026. In January 2026, it earned Platinum status in ReNew Canada’s Top100 report, with 22 projects on the list of the country’s biggest public infrastructure projects. Its notable work includes the Rogers Centre, Toronto’s Port Lands redevelopment and the Keeyask Hydroelectric Generating Station in Manitoba. EllisDon is also working on defense facilities, shipyard infrastructure and large data centers.

Key Construction Solutions
✔ Construction management and general contracting
✔ Public-private partnerships
✔ Healthcare, education and civic buildings
✔ Facilities management services

Best for: Institutional owners who want a long-term partner from design through operations.

4. Pomerleau

Pomerleau is a family-owned company that has been around since 1966 and is based in Saint-Georges, Quebec. It delivers buildings, civil and infrastructure works, and major projects using alternative delivery models. The company has about 5,000 employees working on more than 200 sites across Canada.

Revenue of C$5.3 billion in 2024 makes Pomerleau one of Canada’s largest construction companies. Its subsidiary Borea builds about 35% of Canada’s renewable construction projects. ITC Construction Group, acquired in 2022, is a leading residential builder in Western Canada. Pomerleau Capital invests in private infrastructure. The company has been one of Canada’s Top 100 Employers since 2020, and it’s also a Deloitte Best Managed Company.

Key Construction Solutions
✔ Commercial, institutional and industrial buildings
✔ Civil and infrastructure works
✔ Wind and solar construction through Borea
✔ Multi-family residential through ITC

Best for: Owners in Quebec and beyond who want a builder with renewables and residential depth.

5. Ledcor Group

Ledcor Group was founded in 1947 when Bill Lede incorporated Leduc Construction, and the name changed to Ledcor in 1982. The company is privately held, based in Vancouver, and had about 8,000 employees as of 2023.

Ledcor is one of Canada’s most diversified contractors, working in building, heavy civil, power, marine, forestry, oil and gas, pipelines and communications. Its landmark projects include The Bow in Calgary and the Shangri-La Hotel in Vancouver, each of which was the largest building in its province when it was completed. In Toronto, Ledcor led the LS Lakeshore Constructors joint venture with Sacyr on Metrolinx’s Lakeshore East corridor expansion. That work included three bridge expansions and space for a future fourth track.

Key Construction Solutions
✔ High-rise and commercial building
✔ Highways, bridges and rail infrastructure
✔ Pipelines and energy construction
✔ Environmental and marine services

Best for: Clients who need one contractor across building, civil and energy scopes in Western Canada.

6. Graham Construction

Graham Construction started in 1926 and hits its 100th birthday in 2026. Based in Calgary, it’s an employee-owned business with offices all over Canada and the United States, and its employees can buy shares in the company.

Once again, Graham has made On-Site’s Top Contractors 2026 list of Canada’s largest contractors by revenue, a ranking it has appeared on every year since 2007. It has also been one of Canada’s Best Managed Companies for 26 years running, and it was named one of Alberta’s Top 85 Employers for 2026. Graham recently completed the Stephen Avenue revitalization in downtown Calgary, and Metro Vancouver picked it as construction manager for the North Surrey Interceptor Storage Tank.

Key Construction Solutions
✔ Commercial and institutional buildings
✔ Water and wastewater infrastructure
✔ Industrial and power services
✔ Construction management

Best for: Municipal and industrial owners in Western Canada who value a steady, employee-owned partner.

7. Kiewit Canada

Kiewit is a U.S.-based contractor that has been doing business in Canada for decades. It built a pipeline in Norman Wells, Northwest Territories, back in 1941, and in 1949 it opened its first Canadian office in Vancouver. In 2026, Kiewit marks 85 years in Canada, and it now has more than 4,000 Canadian employees.

It has been involved in some of Canada’s best-known infrastructure, such as the Port Mann/Highway 1 improvement, the Turcot Interchange in Montreal, Ottawa’s Stage 2 Confederation Line and the Waaban Crossing in Kingston. Its energy projects include the Hibernia and Hebron gravity-based structures, Woodfibre LNG and the Darlington New Nuclear Project. In Canada, Kiewit focuses on transportation, marine, energy, water and defense.

Key Construction Solutions
✔ Highways, bridges and transit
✔ Hydro, nuclear and LNG construction
✔ Marine and port works
✔ Mining and industrial facilities

Best for: Owners of heavy civil and energy megaprojects who want global resources with local crews.

8. Bird Construction

Bird Construction was founded in Saskatchewan in 1920 and now operates out of its head office in Mississauga, Ontario. It’s a public company traded on the TSX that delivers buildings, industrial and infrastructure projects across Canada, and it’s known for its P3 work.

Bird has had a huge year. After posting C$3.4 billion in construction revenue in 2025, it reported its first-ever billion-dollar quarter in Q2 2026, with revenue of C$1.04 billion, up 22.6%. Contracted backlog reached C$6.1 billion, with another C$6 billion in pending backlog. A data center project for Bell in Regina is now a major contributor, and the October 2025 acquisition of Fraser River Pile & Dredge added marine and foundation capabilities. Bird is also building infrastructure for BHP’s Jansen potash project.

Key Construction Solutions
✔ Institutional and commercial buildings
✔ Data centers and defense facilities
✔ Industrial maintenance and mining support
✔ Marine and foundation works

Best for: Owners who want a fast-growing national contractor with strong industrial and data center capability.

9. AtkinsRéalis

AtkinsRéalis, known as SNC-Lavalin until 2023, is based in Montreal and publicly traded on the TSX. These days it’s more an engineering, nuclear and project delivery firm than a general contractor, with about 41,000 people worldwide.

It still has a hand in many of Canada’s largest construction programs. AtkinsRéalis reported second-quarter 2026 revenue of C$3.0 billion, up 10%, and a backlog of C$20.2 billion as of June 30, 2026. Its nuclear segment keeps growing: quarterly revenue rose 18.3% year over year to C$671 million, and the company raised its 2026 nuclear revenue outlook to about C$2.7 billion. It also owns the CANDU reactor technology and is promoting it under Canada’s nuclear strategy and in the United States.

Key Construction Solutions
✔ Engineering design and project management
✔ CANDU nuclear services and refurbishment
✔ Transportation and infrastructure advisory
✔ Operations and maintenance

Best for: Governments and utilities planning nuclear and complex infrastructure programs.

10. Broccolini

Broccolini is a family-run business, now in its third generation, that has been building in Montreal since 1949. It builds residential as well as industrial, commercial and institutional projects, and it also develops real estate.

Broccolini built Saputo Stadium in Montreal, the new Maison Radio-Canada headquarters and a large Amazon warehouse in Ottawa. In 2019, the year it celebrated its 70th anniversary, it received the Hommage award at Quebec’s Great Builders Evening. It may be smaller than the national giants on this list, but it offers development and construction under one roof, which can simplify delivery for owners who want a single point of accountability.

Key Construction Solutions
✔ Industrial and logistics buildings
✔ Commercial and office construction
✔ Residential towers
✔ Development and build-to-suit

Best for: Developers and corporate occupiers in Quebec and Ontario who want a builder-developer partner.

How to Choose the Right Construction Partner in Canada

Match Scale to Your Project

Being one of the top 10 construction companies in Canada doesn’t automatically make a company right for your project. If your project is worth C$30 million, find out where it would sit in the contractor’s backlog, because a small job can slip under the radar at a big firm.

Check Sector Experience

Every project type has its own codes and commissioning requirements, whether it’s a hospital, a nuclear plant or a data center. Ask your contractor for three comparable projects completed in the last five years, with references you can call.

Review Safety and Financial Strength

Ask for safety statistics and bonding letters. If the company is publicly traded, its quarterly results and backlog figures are public, so read them before you sign.

Understand the Delivery Model

Fixed price, construction management, design-build and P3 contracts each split risk very differently between owner and contractor. Pick a contractor that has delivered your preferred model in Canada more than once.

Look at Local Labor Access

You want to make sure your contractor has access to skilled labor, which can be hard to find in many provinces. Self-perform crews or strong relationships with unions and subcontractors in your region can go a long way toward keeping your project on schedule.

Frequently Asked Questions About Construction Companies in Canada

Which is the largest construction company in Canada?

PCL Construction has the highest revenue among Canadian-headquartered contractors, at US$9.9 billion in contracting revenue for 2025. Aecon, Pomerleau and EllisDon also rank among the largest contractors in Canada.

Which Canadian construction companies are publicly traded?

Aecon Group, Bird Construction and AtkinsRéalis are public companies that trade on the Toronto Stock Exchange. PCL, EllisDon, Pomerleau, Ledcor and Graham are privately held, and several of them are employee-owned.

Which firm is best for my project?

There’s no single best contractor for everyone. If you’re building a nuclear facility or a transit line, you may want to reach out to Aecon, Kiewit or AtkinsRéalis, while building owners may lean toward PCL, EllisDon or Pomerleau. Your sector, region and delivery model should drive the shortlist.

Is the Canadian construction market growing in 2026?

Yes, for most of the top 10 construction companies in Canada. Bird and Aecon both grew revenue by more than 20% in the second quarter of 2026, and both carry multibillion-dollar backlogs in power, transit and data centers.

Conclusion

The top 10 construction companies in Canada will be busy through 2026, with full order books and a steady push into energy, transit and digital infrastructure. Employee-owned builders like PCL, EllisDon and Graham sit alongside listed firms like Aecon and Bird that are posting record numbers.

That’s good news for owners, and a warning too. If you’re in the market for a contractor, you have plenty of capable options, but the best teams already have a lot on their plate. Start your search early, match the contractor to your sector and delivery model, and use this list of the top 10 construction companies in Canada as a starting point for your shortlist.

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