Top 10 Biggest Construction Companies in Australia Dominating 2025

Australia’s biggest construction companies drive rail, road, defence, and property programs nationwide. The Australian construction industry continues to expand despite rising costs and workforce shortages.

Australia has 452,820 active construction companies as of June 2025. Of those, 10 construction companies deliver the largest infrastructure programs. They create skilled jobs and lead projects in tunnelling, renewables, urban services, and health.

How we ranked them: We used the latest 2024 revenue in USD from industry sources and annual reports covering construction companies in Australia. Currency swings, fiscal year timing, and subsidiary consolidation explain the revenue differences across lists.

1. Downer Group

Downer Group ranks as Australia’s most significant construction and infrastructure services provider by total revenue reported in 2024. It delivers whole-of-life infrastructure project solutions in transport, energy, and essential services.

• Headquarters: Sydney, New South Wales, Australia
• Year Established: 1933
• Ownership Type: Publicly listed on the Australian Securities Exchange (ASX: DOW)
• Chief Executive Officer: Peter Tompkins
• Workforce Size: 26,000+ employees across Australia and New Zealand
• Annual Revenue (2024): USD 7.24 billion (≈ AUD 11.10 billion)
• Geographic Reach: National operations covering urban transport, regional infrastructure, and essential public services
• Notable Projects: Melbourne Cricket Ground redevelopment, Sydney Growth Trains, Auckland City Rail Link (rail systems and facilities integration)

Downer specializes in delivering whole-of-life infrastructure, combining construction, digital engineering, and long-term asset performance services. Its integrated model supports transportation upgrades, utility maintenance, and the delivery of critical social infrastructure.

2. Lendlease

Lendlease ranks as one of Australia’s biggest construction companies, with significant developments across Australia, Asia, Europe, and the Americas. It operates across construction, investment management, and large-scale urban regeneration.

• Headquarters: Sydney, New South Wales, Australia
• Year Established: 1958
• Ownership Type: Publicly listed on the Australian Securities Exchange (ASX: LLC)
• Chief Executive Officer: Tony Lombardo
• Workforce Size: 7,800+ employees globally
• Annual Revenue (2024): USD 6.07 billion (≈ AUD 9.32 billion)
• Geographic Reach: Projects delivered across Australia, Asia, Europe, and North America
• Notable Projects: Barangaroo South (Sydney), Elephant Park (London), Paya Lebar Quarter (Singapore), 1 Java Street (New York City)

Lendlease combines property development, construction, and funds management across a vertically integrated business model. Its focus areas include commercial projects, mixed-use precincts, life sciences, and low-carbon buildings.

3. CIMIC Group

CIMIC Group (short for Construction, Infrastructure, Mining and Concessions) ranks among Australia’s largest construction and engineering companies by total revenue. It delivers large-scale civil construction, industrial, and resource sector projects through subsidiaries, including CPB Contractors, Sedgman, and UGL.

• Headquarters: North Sydney, New South Wales, Australia
• Year Established: 1949 (originally as Leighton Holdings; rebranded to CIMIC in 2015)
• Ownership Type: Publicly listed on the Australian Securities Exchange (ASX: CIM)
• Chief Executive Officer: Juan Santamaria Cases
• Workforce Size: 25,500+ employees across Australia, Asia, and the Middle East
• Annual Revenue (2024): USD 5.87 billion (≈ AUD 9.01 billion)
• Geographic Reach: Operates in over 20 countries, including Australia, New Zealand, the Philippines, and India
• Notable Projects: WestConnex M4 - M5 Link (Sydney), Cross River Rail (Brisbane), North East Link early works (Melbourne)

CIMIC integrates construction, services, and engineering within a centralised delivery model. It continues to expand into industrial projects, energy transition, and long-term social procurement initiatives.

4. Laing O’Rourke

Laing O’Rourke Australia is a leading privately owned construction and engineering company, specializing in the delivery of complex, high-risk infrastructure projects. It leads in digital engineering, collaborative contracting, and significant projects in transport, defence, and water.

• Headquarters: Sydney, New South Wales, Australia
• Year Established: 2001 (formed from the acquisition of RGC Group, formerly Barclay Mowlem, est. 1920)
• Ownership Type: Private
• Chief Executive Officer (Australia): Cathal O’Rourke
• Workforce Size: 5,000+ across Australia and the UK
• Annual Revenue (2024): USD 4.32 billion (≈ AUD 6.63 billion)
• Geographic Reach: Focused on Australia and the United Kingdom
• Notable Projects: Inland Rail (NSW/QLD), Sydney Metro (multiple packages), Osborne South Naval Shipyard (SA)

Laing O’Rourke applies advanced digital methods and modern construction to improve efficiency and delivery certainty. Its innovative project delivery model supports speed, safety, and long-term client value.

5. John Holland

John Holland is one of Australia’s most significant privately owned infrastructure, transport, and property construction companies. It focuses on complex projects in rail, tunnelling, health, road construction, and renewable energy.

• Headquarters: Melbourne, Victoria, Australia
• Year Established: 1949
• Ownership Type: Private (Wholly owned subsidiary of China Communications Construction Company since 2015)
• Chief Executive Officer: Joe Barr
• Workforce Size: 5,000+ across Australia and New Zealand
• Annual Revenue (2024): USD 4.43 billion (≈ AUD 6.79 billion)
• Geographic Reach: Projects across Australia and expanding Asia-Pacific partnerships
• Notable Projects: Melbourne Metro Tunnel, Sydney Metro City & Southwest, Snowy 2.0 (pumped hydro), Western Sydney Airport

John Holland employs thousands of skilled civil engineers, combining global strength with local delivery expertise. Its inclusive workforce strategy and community partnerships support long-term contract success.

6. Hutchinson Builders

Hutchinson Builders (widely known as “Hutchies”) is Australia’s largest privately owned construction company by annual revenue and workforce size. It delivers projects for commercial, residential, educational, and infrastructure purposes in every state and territory.

• Headquarters: Brisbane, Queensland, Australia
• Year Established: 1912
• Ownership Type: Private (family-owned)
• Chairman: Scott Hutchinson
• Workforce Size: 2,000+ direct employees, 300+ apprentices and cadets
• Annual Revenue (2024): USD 2.21 billion (≈ AUD 3.39 billion)
• Geographic Reach: Active on over 300 sites nationwide at any given time
• Notable Projects: West Village (Brisbane), QIMR Berghofer Institute, Macquarie University Courtyard Precinct, Gold Coast Airport expansion

Hutchies manages active construction work on 300+ sites through flat structure and direct project oversight. Its consistent delivery and culture of care make it a top choice for long-term clients.

7. Multiplex

Multiplex is a global construction contractor headquartered in Australia, known for delivering complex high-rise, commercial, health, and infrastructure projects. This global construction group, owned by Brookfield, maintains a strong local delivery presence.

• Headquarters: Sydney, New South Wales, Australia
• Year Established: 1962
• Ownership Type: Private (subsidiary of Brookfield Asset Management)
• Managing Director (Australia): Graham Cottam
• Workforce Size: 1,000+ direct employees across Australian operations
• Annual Revenue (2024): USD 2 billion (≈ AUD 3.07 billion)
• Geographic Reach: Active across Australia, Asia, the Middle East, and North America
• Notable Projects: Jewel Residences (Gold Coast), The One (Toronto), Perth Children’s Hospital, Collins Arch (Melbourne)

Multiplex focuses on safety, innovation, and sustainable practices in the delivery of high-performance buildings. Its global resources support efficient delivery of large-scale, technically complex assets.

8. Mirvac

Mirvac is a leading Australian property group that integrates development, construction, investment, and asset management across commercial and residential sectors. It focuses on community projects, sustainable urban precincts, and mixed-use developments.

• Headquarters: Sydney, New South Wales, Australia
• Year Established: 1972
• Ownership Type: Publicly listed on the Australian Securities Exchange (ASX: MGR)
• Chief Executive Officer: Campbell Hanan
• Workforce Size: 1,400+ across development, design, construction, and operations
• Annual Revenue (2024): USD 2.00 billion (≈ AUD 3.07 billion)
• Geographic Reach: Projects across Sydney, Melbourne, Brisbane, and Perth
• Notable Projects: South Eveleigh Precinct (Sydney), Green Square (Sydney), The Foundry, 80 Ann Street (Brisbane)

Mirvac is recognised for its sustainability performance, with net positive carbon operations since fiscal year 2022. Its ESG-led strategy strengthens investor confidence and tenant retention.

9. BMD Group

BMD Group (named after its founders, Bielby, Moxham, and D’Arcy) is Australia’s largest privately owned civil contractor. It delivers transport, defence, building, and urban infrastructure projects across the public and private sectors.

• Headquarters: Manly, Queensland, Australia
• Year Established: 1979
• Ownership Type: Private (family-owned)
• Managing Director: Scott Power
• Workforce Size: 2,000+ employees across all states and territories
• Annual Revenue (2024): USD 1.52 billion (≈ AUD 2.33 billion)
• Geographic Reach: Projects delivered nationwide, including South Australia, remote areas, and regional communities.
• Notable Projects: Victorian International Container Terminal (VICT), Port of Melbourne, Victoria, Legacy Way, Brisbane, Queensland, Carmichael Rail Network, Galilee Basin, Queensland, Molonglo River Bridge, Canberra, ACT

BMD’s project management model values collaboration, safety, and community impact. Its divisions span building, civil engineering, and land development nationwide.

10. Hansen Yuncken

Hansen Yuncken is a prominent Australian construction company with a rich history, specializing in the delivery of complex public and private sector projects across a wide range of sectors.

• Headquarters: Melbourne, Victoria, Australia
• Year Established: 1918
• Ownership Type: Private
• Chief Executive Officer: Peter Salac
• Workforce Size: Approximately 600 employees
• Annual Revenue (2024): USD 0.80 billion (≈ AUD 1.23 billion)
• Geographic Reach: Operates nationally across Australia, with offices in major cities.
• Featured projects: Sydney Coliseum Theatre (Sydney, NSW), Emirates Wolgan Valley Resort & Spa (Wolgan Valley, NSW), Council House 2 (CH2) (Melbourne, VIC)

Hansen Yuncken is recognized for its expertise in delivering large-scale, complex projects, with a focus on innovation, sustainability, and collaborative approaches. Their portfolio includes significant projects in health, education, commercial, and government sectors.

What Do these Biggest Construction Companies in Australia Have in Common?

The largest construction companies in Australia share core traits that drive scale, performance, and national project leadership. These shared qualities help them rank consistently among the biggest, most trusted Australian construction companies.

• Nationwide project delivery: Each company delivers construction work across multiple states and territories, including urban and regional areas.
• Full-scope project management: They handle every stage - design, planning, procurement, construction, and post-completion asset support.
• Infrastructure-first portfolios: Their focus includes major road construction, rail, defence, energy, and government infrastructure projects.
• Large, skilled workforces: These companies invest in civil engineers, apprenticeships, safety programs, and long-term job creation.
• Modern construction methods: From digital engineering to modular builds, they adopt tools that improve speed, cost, and outcomes.
• Reliable client partnerships: Their strong relationships with public and private clients drive repeat contracts and long-term pipelines.
• Resilience in changing markets: They adapt to new regulations, delivery models, and funding structures without slowing performance.

These factors help define what it takes to be a leading construction company in Australia. Together, they connect the largest firms to the broader group of trusted, high-performing Australian construction companies.

The Companies Powering the Rest of Australia’s Build

These ten largest construction companies in Australia represent the scale, capability, and consistency shaping the country’s most extensive programs. But across the nation, many others are driving impact through regional delivery, specialist sectors, and innovation at every level.

The built environment depends on a much broader ecosystem, Tier 2 and Tier 3 contractors, joint ventures, specialist consultancies, and emerging delivery models. While this list highlights headline revenue, real value comes from reliable execution, trusted partnerships, and adapting to evolving project demands.

For industry professionals and delivery teams across Australian construction firms, the challenge ahead is clear: deliver faster, smarter, and more sustainably. Whether you're collaborating with these leaders or rising through the ranks, the future belongs to those ready to deliver with purpose.