The largest construction companies in Canada serve as testaments to the domestic market’s growth, valued at $325.1 billion in 2021. Recent data indicates the market size reached $351.1 billion in 2023, surpassing earlier projections of $304.6 billion.

If you’re a construction contractor in Canada, you know the industry is fiercely competitive. With so many companies vying for business, staying ahead of the pack can be tough. So, how do you know which companies are worth working with? 

Check out our list of Canada’s 40 largest construction companies, based on revenue in 2021, as determined by annual research from On-Site. We’ll also take a closer look at Canada’s top 10 construction companies to understand what makes them so prominent in the industry.

Top 40 largest construction companies in Canada

Position	Company	Revenue
1	PCL Construction	$7.6 billion
2	EllisDon Corporation	$5.0 billion
3	Aecon Group Incorporated	$4.0 billion
4	Graham Construction	$3.5 billion
5	Kiewit Canada Group Incorporated	$3 billion
6	Ledcor Group of Companies	$3 billion
7	Pomerleau Incorporated	$3 billion
8	Bird Construction Incorporated	$2.2 billion
9	Broccolini	$1.3 billion
10	Flynn Group of Companies	$1.2 billion
11	SNC-Lavalin	$1.1 billion
12	Stuart Olson	$1.0 billion
13	Chandos Construction	$950 million
14	EllisDon Civil	$900 million
15	Maple Reinders Constructors Ltd.	$880 million
16	Dawson Wallace Construction	$850 million
17	Eastern Construction	$830 million
18	Turner Construction Company	$820 million
19	Buttcon Limited	$810 million
20	Walsh Canada	$800 million
21	Alberici Constructors Ltd.	$780 million
22	Govan Brown	$750 million
23	Magil Construction	$730 million
24	Graham Group	$710 million
25	Clark Builders	$700 million
26	Maxim Construction	$690 million
27	AECOM Canada	$680 million
28	Vanbots Construction Corporation	$670 million
29	Bird-Kiewit Joint Venture	$660 million
30	MHPM Project Managers Inc.	$650 million
31	EllisDon Design Build	$640 million
32	Ledcor Technical Services	$630 million
33	Darcon Construction Management Ltd.	$620 million
34	Kenaidan Contracting Ltd.	$610 million
35	Design Build Services Inc.	$600 million
36	PCL Civil Constructors	$590 million
37	Canem Systems Ltd.	$580 million
38	Derksen Construction	$570 million
39	Bennett Mechanical Installations	$560 million
40	Carillion Canada	$550 million

A closer look at the top 10 construction companies in Canada

Now that you’ve seen the full list let’s take a closer look at the ten largest Canadian construction companies based on revenue.

#1. PCL Construction

PCL Construction takes the top spot by quite a large margin, bringing in $7.6 billion compared to the second-largest company’s roughly $4.9 billion.

James Martin and Ernest Edward Poole founded the company in Saskatchewan in 1906. Today, it employs over 4,000 workers and has offices in Canada, the United States, the Caribbean, and Australia.

PCL’s noteworthy projects are almost too many to count, including rehabilitating Canada’s historic West Block building on Parliament Hill and restoring the nearby Senate of Canada Building.

Beyond building restoration, PCL’s services include procurement, design, and construction management in just about every sector imaginable.

#2. EllisDon Corporation

EllisDon is a Mississauga-based, employee-owned construction company with offices worldwide (including 15 in Canada alone).

The company’s roots stretch back to 1951 when brothers Don and David Ellis Smith began performing small renovations.

Today, EllisDon’s projects are anything but small, however. The giant’s notable work includes major upgrades to the famous Art Gallery of Ontario and the construction of Brampton Civic Hospital in partnership with a consortium of other firms.

EllisDon pulled in an estimated $4,974,492,000 in 2021, making it undoubtedly one of the most successful Canadian construction companies.

#3. Aecon Group Incorporated

Aecon Group Incorporated boasts more than 12,000 employees and estimated revenues of $3,977,000,000 in 2021.

The company’s historical provenance is just as staggering, with noteworthy projects including the CN Tower, Gardiner Expressway, and Montreal-Trudeau International Airport.

Aecon operates in several sectors, including civil, transportation, utilities, industrial, and nuclear. It has completed projects in North America, South America, Asia, and the Middle East.

#4. Graham Construction

Graham Construction is one of the largest construction companies in Canada, focused on the industrial and infrastructure sectors. The company started in 1926 at Canadian Pacific Railway stations in Moose Jaw, Saskatchewan.

Today, Graham Construction works on various projects, with recent portfolio items including the Canadian Armed Forces Military Police Academy in Angus, Ontario, and a CFB Trenton Maintenance and Operations Hangar in Toronto.

Graham Construction is an employee-owned firm with several subsidiaries, including Graham Capital, Gracorp, Quinn, and Moltz Construction Incorporated.

#5. Kiewit Canada Group Incorporated

Kiewit is a truly historic company, having been founded in 1884. It has been one of the largest contenders in the Canadian construction market for more than 75 years, serving sectors such as mining, power, and transportation.

Kiewit has received several awards in Canada and is considered one of the nation’s best employers in recent years. Its estimated 2021 revenue of $3,005,000,000 also makes it one of the largest construction companies operating in Canada.

#6. Ledcor Group of Companies

Ledcor Group of Companies is an employee-owned construction company with primary operations in Canada and the United States. It was founded by a man named William Lede in 1947 and currently employs roughly 6,000 workers.

Notable recent projects include work on the Albian Sands Energy Incorporated expansion in Fort McMurray and the 565 Great Northern Way digital media facility in Vancouver.

In 2021, Ledcor’s revenue topped an estimated $3 billion.

#7. Pomerleau Incorporated

Pomerleau Incorporated was founded in 1964 by Hervé Pomerleau. The company grew rapidly throughout the rest of the decade, with revenue jumping from just $18,000 in 1964 to $1.6 million by 1969.

Pomerleau Incorporated’s projects today include the redevelopment of Lansdowne Park in Ottawa and the construction of the Videotron Centre in Quebec City.

Pomerleau Incorporated pulled in an estimated $2,957,456,000 in 2021, firmly cementing its place among the largest Canadian construction companies.

#8. Bird Construction Incorporated

Bird Construction has been a leading force in the Canadian market for more than 100 years. The company’s humble beginnings trace back to Saskatchewan in 1920.

Bird’s current work focuses on the energy, mining, institutional, retail, residential, and civil construction sectors. Notable recent projects include the construction of the Whitby Rail Maintenance Facility and Avenir Centre.

Bird Construction Incorporated employs over 1,500 workers and saw an estimated $2,220,026,000 in revenue for 2021.

#9. Broccolini Construction

Broccolini Construction has been around since 1949 and was founded in Montreal, focusing on residential construction until the 1970s, when it branched out into the commercial and industrial sectors.

In 2021, the company pulled in a whopping $1,286,000,000.

#10. Flynn Group of Companies

The Flynn Group’s estimated 2021 haul of $1,184,502,525 is nothing to scoff at. The company has been in business for over 40 years, offering commercial glazing, roofing, and cladding services throughout North America. 

It employs more than 5,000 people and has a staggering number of locations from coast to coast, including in the United States.

Quick facts about Canada’s construction industry

To help you understand how the Canadian construction companies on this list can achieve such tremendous success, let’s take a quick look at Canada’s construction industry as a whole.

Here are some quick facts about Canada’s construction industry:

• Construction is one of the nation’s most important sectors, accounting for 14% of the country’s GDP and employing more than one million people, according to Canada’s Building Trades Unions (CBTU).
• The construction industry has grown rapidly since the post-war era, pushing through setbacks like the Great Recession and COVID-19. Despite the pandemic, Statistics Canada reported a jump in the value of nearly 20% in 2021.
• Spending on infrastructure assets rose by more than $7 billion in 2021.
• A shortage of skilled workers means greater efforts are being made to attract workers from all backgrounds, with 75% of companies in recent years looking to recruit youth, newcomers to Canada, Indigenous workers, and women.
• In the last decade, the Canadian construction industry has seen significant innovation, using 3D models, AI, and drones to reduce waste and increase productivity.
• Despite inflation and foreseeable issues procuring materials due to the COVID-19 pandemic, On-Site’s 2022 Top Contractors survey participants are optimistic due to the steady demand for building.

We hope this article has provided you with valuable insights into the sector’s key domestic players.

For more content about the construction industry, visit our blog.

Frequently Asked Questions

Which is the biggest construction company in Canada?

The biggest construction company in Canada is PCL Construction, with an annual revenue of $7.6 billion.

Who is Canada’s most trusted contractor?

EllisDon Corporation is often regarded as one of Canada’s most trusted contractors due to its extensive portfolio and consistent performance.

What is the largest concrete company in Canada?

The largest concrete company in Canada is Lafarge Canada, a leading provider of construction materials including cement, aggregates, and ready-mix concrete.

What is the largest construction union in Canada?

The largest construction union in Canada is the Labourers’ International Union of North America (LiUNA).

What are the 3 biggest unions in the country?

The three biggest unions in Canada are the Canadian Union of Public Employees (CUPE), the National Union of Public and General Employees (NUPGE), and Unifor.

What are the largest building materials companies in Canada?

The largest building materials companies in Canada include Lafarge Canada, CRH Canada Group Inc., and Lehigh Hanson.

Who is Canada’s largest home builder?

Canada’s largest home builder is Mattamy Homes, known for its extensive residential developments across the country.

How many construction firms are there in Canada?

There are approximately 50,000 construction firms in Canada, ranging from small contractors to large multinational corporations.

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