Canada’s Top 5 Commercial Construction Firms and the Projects They’re Leading in 2025

Canada's top five commercial construction firms in 2026 are PCL Construction, EllisDon Corporation, Pomerleau, Graham Construction, and Aecon Group Inc. These companies are driving some of the country's largest infrastructure, nuclear, and commercial development projects.

If you're positioning bids, sourcing partners, or evaluating your project pipeline, knowing which sectors these firms are focusing on can give you an edge in the competitive construction market.

In this article, we’ll review Canada’s top five commercial construction firms, their active projects, and the trends shaping the market in 2026.

How Did We Select the Top 5 Construction Companies?

We selected the top five construction companies in Canada based primarily on On-Site Magazine’s 2025 Top Contractors report, which ranked Canadian general contractors based on their 2024 revenue. We also looked at the companies’ active projects and their overall influence on Canada’s commercial construction market.

We always aim to provide actionable insights that help refine business strategies, so you can make informed decisions and stay competitive in a rapidly evolving market.

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Which Construction Companies Are Leading Canada’s Commercial Market in 2026?

As mentioned, Canada’s leading commercial construction firms in 2026 are PCL Construction, EllisDon Corporation, Pomerleau, Graham Construction, and Aecon Group Inc.

These companies are driving major work across healthcare, transit, wastewater, institutional buildings, commercial developments, energy, and public infrastructure.

Let’s look at each in detail.

1. PCL Construction

PCL Construction remains Canada’s largest contractor by revenue and one of the most influential construction firms in North America. On-Site Magazine ranked PCL first among Canadian contractors with a revenue of $11.3 billion in 2024.

Based in Edmonton, Alberta, PCL operates across civil infrastructure, heavy industrial, and solar markets. Its employee-owned model remains a key part of its identity, providing the firm with strong continuity across long-term, complex projects.

PCL’s active project portfolio in 2026 includes several major healthcare and infrastructure builds. The company announced that 17 of its projects were included in ReNew Canada’s 2026 Top 100 Infrastructure Projects report.

These include:

• QEII Halifax Infirmary Expansion Project
• The New St. Paul’s Hospital in Vancouver
• Prince Albert Victoria Hospital
• Yellowhead Trail Freeway Conversion in Edmonton
• CAMH Phase 1D in Toronto
• The Ottawa Hospital New Campus Development

2. EllisDon Corporation

EllisDon Corporation ranks second among Canada’s top contractors, with On-Site Magazine reporting revenue of $8.1 billion in 2024.

The firm is headquartered in Mississauga, Ontario, and has grown from a traditional contractor into a major construction services, technology, development, and infrastructure delivery company.

Notable active projects include:

• UHN Toronto Western Hospital
• The Peter Gilgan Mississauga Hospital and Shah Family Hospital for Women and Children
• Sir Robert Peel Centre
• 4th Avenue Flyover Bridge Rehabilitation

3. Pomerleau

Third on our list is Pomerleau. On-Site Magazine reports that the company made a revenue of $5.26 billion in 2024. The company is based in Quebec and is one of Canada’s largest family-owned construction firms, with more than 5,000 employees and over 200 active project sites across the country.

Major project areas include transportation, public infrastructure, healthcare, government facilities, and large commercial developments. Pomerleau has also been involved in nearly 20% of Canada’s 100 largest projects, including the Annacis Island Wastewater Treatment Plant expansion in British Columbia.

4. Graham Construction

Graham Construction comes in fourth among Canada’s top contractors. On-Site Magazine reports that the company made $4.3 billion in revenue in 2024.

Based in Calgary, Alberta, Graham has a long history in Canadian construction and is approaching its 100th year in business. The company works across industrial, infrastructure, water, wastewater, transportation, healthcare, and alternative delivery projects.

The company is currently involved in several major infrastructure and building projects featured on ReNew Canada’s Top 100 Biggest Infrastructure Projects. These include:

• Calgary Green Line LRT
• Don River and Central Waterfront & Connected Projects
• Iona Island Wastewater Treatment Projects
• GO Expansion — Early Works
• Richmond Hospital Redevelopment

5. Aecon Group Inc.

Aecon takes the fifth spot among Canada’s top contractors. According to On-Site Magazine, the company made $4.24 billion in revenue in 2024.

Headquartered in Toronto, Aecon is heavily involved in civil infrastructure, nuclear, utilities, industrial, and urban transportation projects.

Key active projects include:

• Darlington New Nuclear Project
• Scarborough Subway Extension
• RSR Wastewater Treatment Facility works in Manitoba
• Pickering Nuclear work
• Arctic Over-the-Horizon Radar Program Stage 1
• Port of Montreal Expansion in Contrecoeur

What Key Trends Are Reshaping Commercial Construction in 2026?

Canada's construction market is being shaped by persistent labour constraints, pressure to adopt digital technologies, and growing expectations for sustainable delivery.

Here's a brief overview of the key trends reshaping the commercial construction space:

• Digital tools are no longer optional: A joint report from the Canadian Construction Association and KPMG found that 90% of construction leaders say they need digital tools such as BIM, AI-assisted preconstruction, and project management platforms to increase productivity.
• Procurement reform is gaining traction: Progressive design-build, integrated project delivery, and construction management models are replacing lowest-bid procurement on complex projects.
• Labour shortages persist: BuildForce Canada's Annual Report projects that 21% of the construction and maintenance workforce will retire between 2024 and 2033. This will result in more than 351,800 new hires needed just to keep pace with demand and replace departing workers. Firms that are actively recruiting from underrepresented groups (such as women, Indigenous Peoples, and newcomers to Canada) and investing in automation will manage this situation better than those relying solely on traditional hiring.
• Sustainability demand: Low-carbon materials like mass timber, energy-efficient systems, and net-zero building targets are no longer just optional upgrades. They’re now being written into project specifications and municipal requirements.
• Supply chain resilience: US tariffs are increasing material costs and disrupting trade flows. Firms diversifying their supplier base, prioritizing domestic sourcing, and building long-term vendor relationships are managing exposure more effectively.

How Can These Insights Strengthen Your Competitiveness in Commercial Construction?

The firms leading Canada's construction market in 2026 are succeeding because they've aligned their capabilities with where public investment is flowing — nuclear, civil infrastructure, water treatment, and transit.

If you're bidding on work in these sectors, understanding the priorities and delivery models of top construction companies will help you position your services more effectively and anticipate what they'll need from subcontractors and suppliers.

Your sourcing decisions also carry more weight than they used to. Reliable access solutions directly affect inspection timelines, maintenance access, and code compliance on commercial and industrial projects.

To keep up with these trends and ensure your projects run smoothly, having the right access solutions is essential, as modern construction increasingly relies on efficiency, safety, and adaptability. High-quality access doors provide secure and convenient access to critical areas for maintenance, inspections, or equipment installation.

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FAQs on Access Doors in Modern Commercial Construction Projects

1. What role do access doors play in maintaining essential building systems?

Access doors provide safe and convenient access to mechanical, electrical, plumbing, and communication systems that require regular maintenance and servicing. They allow technicians to reach concealed components without damaging finished surfaces.

2. How do fire-rated access doors support code compliance in commercial buildings?

Fire-rated access doors help maintain fire-resistant barriers that slow the movement of flames and heat. They’re built to meet strict building codes and are essential for protecting service areas in commercial structures.

3. What considerations determine the selection of access doors for specialized facilities?

Selection is based on the facility’s needs, environmental conditions, and safety requirements. Specialized settings such as hospitals, laboratories, data centres, and industrial plants often require airtight construction, secure locking systems, thermal protection, or corrosion-resistant materials.

4. How do high-performance access doors contribute to long-term building efficiency?

High-performance access doors support long-term efficiency by reducing maintenance time, protecting sensitive systems, and helping maintain controlled interior conditions.

To Sum It Up

Having a clear understanding of Canada’s commercial construction landscape, including the companies leading major projects and the trends shaping modern building practices, can help you plan more effectively and achieve stronger project outcomes.

For contractors, the opportunity lies in alignment. If you understand where these firms are concentrating their work and what they need from their supply chains, you can position your business to capture more of that activity.

This means qualifying for nuclear supply chains, investing in the certifications required for public-sector work, and ensuring your project components (including access solutions) meet the specifications these projects demand.

Access Doors Canada supports commercial and industrial construction with durable, code-compliant access doors and panels built for demanding environments. Explore our full product range or call +1-888-327-5471 for expert guidance on your next project.