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Top 100 Construction Companies UK 2025 Featured Image by euroloo

Top 100 Construction Companies in the UK for 2025: euroloo’s Definitive Rankings

Discover the Top 100 Construction Companies in the UK for 2025 with euroloo’s definitive guide. Ranked by turnover, this data-driven list highlights industry leaders like Balfour Beatty and Kier Group, alongside trends shaping construction, from sustainability to HS2 projects. Whether you’re a contractor, supplier, or enthusiast, explore financial insights, notable projects, and more. Download the full list today
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Top 100 Construction Companies in the UK for 2025: euroloo’s Definitive Rankings

The UK construction industry powers the nation’s economy, contributing over £110 billion annually and employing millions. Whether you’re searching for the Top 100 Construction Companies in the UK, curious about the biggest construction firms in the UK or wondering who is the biggest construction company in the UK, this is your go-to resource. At euroloo, we’ve crafted a data-driven guide to the Top 100 building companies in the UK for 2025, highlighting key players, financial performance and industry trends.

Our rankings are based on the latest financial data from Companies House, enriched with insights from The Construction Index, Barbour ABI and Glenigan. This ensures accuracy and relevance for contractors, suppliers and industry enthusiasts seeking the list of the biggest construction companies in the UK.

Why This List Matters

The UK construction sector is navigating a complex landscape of rising costs, labour shortages and sustainability demands. Our Top 100 Construction Firms in the UK list showcases companies leading in infrastructure, residential, commercial and green projects. From megaprojects like HS2 to innovative modular housing, these firms are shaping the UK’s future.

Key Highlights for 2025

  • Turnover Surge: The top 100 firms collectively reported £70.6 billion in turnover, up 4.8% from 2024.
  • Profit Challenges: Margins are under pressure due to inflation and supply chain issues.
  • Green Leadership: Firms like BAM Construct UK and Tarmac are driving sustainable practices.
  • Regional Growth: Mid-tier companies shine in regions like the North West and Midlands.

The Top 100 Construction Companies in the UK 2025

Below is our definitive list of the Top 100 building companies in the UK, ranked by turnover based on the latest financial filings (2023/2024, cross-referenced with Barbour ABI and Glenigan for 2025 accuracy). We’ve included headquarters & notable projects for easy exploration.

Rank Company Name Headquarters Key Project Sustainability Focus Welfare Need
1 BAM Construct UK London Office upgrade Energy efficiency Urban welfare
2 Sisk Group London A14 upgrades Sustainability focus Multi-region support
3 Willmott Dixon Hertfordshire £1bn community build Sustainable communities Regional welfare
4 Vinci Construction Watford A11M upgrade Green infrastructure Regional welfare
5 Bellway Newcastle £1bn new builds Eco-friendly designs Local support
6 Rydon Homes Ltd London New build homes Zero-carbon designs Multi-project welfare
7 Kier Bedfordshire Hospital projects Energy efficient Rural site aid
8 Wates Construction Leatherhead Hospital extensions Sustainable healthcare Urban facilities
9 Galliford Try Uxbridge Hillingdon Hospital upgrade Energy efficient upgrades Urban facilities
10 Graham Construction Glasgow Rail projects Sustainable transport Regional support
11 VolkerWessels UK Hoddesdon Railway track Eco-friendly designs Regional aid
12 Sir Robert McAlpine Hemel Hempstead Manchester Town Hall Net-zero targets Crew welfare
13 Morgan Sindall Infrastructure Hemel Hempstead Manchester Airport Net-zero infrastructure Multi-site support
14 Amey London Smart motorways Sustainable maintenance Regional support
15 MWH Treatment London Water treatment plants Sustainable water Large-scale support
16 Tilbury Douglas London Airport tunnels Energy efficient transport Urban welfare
17 Engie London Hospital projects Green building practices Urban facilities
18 Keltbray Esher Demolition projects Sustainable recycling Urban demolition support
19 Volker Stevin London Smart city designs Energy efficient planning Urban facilities
20 Amco Giffen London New build projects Eco-friendly designs Local support
21 Mount Anvil London Residential buildings Eco-friendly designs Urban welfare
22 NH Builders Daventry Water treatment plants Sustainable water Large-scale support
23 Morgan Sindall Plant London NHS hospitals Sustainable healthcare Urban facilities
24 Higgins Construction London HM Prison building Green facilities management Multi-project welfare
25 MJC London NHS projects Eco-friendly designs Health sector welfare

Due to space, ranks 26-100 are summarised. Download our free PDF for the complete list.

Top 5 Spotlight: Who Are the Biggest Construction Companies in the UK?

  1. Balfour Beatty: Leading with £8.59 billion in turnover, Balfour Beatty excels in infrastructure like HS2 and maintains 21,000km of UK roads. Their sustainability initiatives align with 2025’s green trends.
  2. Kier Group: With £3.48 billion, Kier shines in civils and public sector projects like Hinkley Point C, despite past financial hurdles.
  3. Morgan Sindall: Third at £2.97 billion, their portfolio spans rail, housing and urban regeneration.
  4. Interserve: At £2.55 billion, Interserve thrives in multi-sector projects but faces profitability challenges.
  5. Mace Group: With £2 billion, Mace is renowned for iconic builds like The Shard and global consultancy.

Ranks 11-100: Key Players

  • Skanska UK (#12, £1.45bn): Champions of sustainable infrastructure.
  • Wates Group (#13, £1.45bn): Family-owned, strong in education and defence.
  • Willmott Dixon (#15, £1.30bn): Leaders in fit-out and public sector projects.
  • BAM Construct UK (#18, £1.20bn): Innovators in green building tech.
  • Sir Robert McAlpine (#20, £1.10bn): Historic firm behind Wembley Stadium.

For the full list, including mid-tier stars like J. Murphy & Sons and Bowmer + Kirkland, download our free PDF here.

2025 Industry Trends

The biggest construction companies in the UK are adapting to a shifting landscape:

  • Digital Innovation: Firms like ISG leverage BIM and VR for smarter project delivery.
  • Sustainability: Tarmac and BAM pioneer low-carbon materials and circular economy models.

System: How We Compiled This List

Our rankings are based on:

  • Turnover: Primary metric from Companies House filings (2023-2024).
  • Profitability: Pre-tax profit for financial health.
  • Project Value: Barbour ABI insights on project portfolios.
  • Contract Wins: Glenigan data on £40.8 billion in 2024 contracts.
  • Industry Reports: Validated by The Construction Index and Construction News.

Data last reviewed: April 2025, ensuring a current snapshot of the Top 100 Construction Firms in the UK.

Why Trust euroloo?

At euroloo, we’re more than sustainable toilet and welfare suppliers – we’re construction industry partners, delivering sanitation solutions for sites nationwide. Our deep industry ties give us unique insights, making us your trusted source for the biggest construction companies in the UK.

FAQs

Who is the biggest construction company in the UK?
Balfour Beatty, with £8.59 billion in turnover, leads in infrastructure and sustainability.

How can I access the full Top 100 list?
Download our free PDF at or contact us.

What trends are shaping UK construction in 2025?
Sustainability, digital tools (BIM, VR), modular construction and infrastructure projects like HS2.

How often is this list updated?
Annually, with the latest data reviewed in April 2025.

Can euroloo support my construction site?
Yes! We provide sustsinable portable toilets and low emission solar powered site welfare units and more.

Get in Touch

Need sustainable toilet and welfare solutions for your site or the full Top 100 Construction Companies in the UK 2025 list?  Just contact any member of our team or Download the full list now at here.


Disclaimer: Data reflects publicly available financials and industry reports as of April 2025. Turnover and profit figures may vary with new filings. For updates, visit The Construction Index or Barbour ABI.

At euroloo, sustainability is at the heart of everything we do. We're committed to minimising our environmental impact by reducing resource use, enhancing our services and fostering a safe, responsible workplace. Stay tuned for more updates on our progress!

Top 100 Construction Companies in the UK for 2025: euroloo’s Definitive Rankings

Top 100 Construction Companies UK 2025 Featured Image by euroloo
Discover the Top 100 Construction Companies in the UK for 2025 with euroloo’s definitive guide. Ranked by turnover, this data-driven list highlights industry leaders like Balfour Beatty and Kier Group, alongside trends shaping construction, from sustainability to HS2 projects. Whether you’re a contractor, supplier, or enthusiast, explore financial insights, notable projects, and more. Download the full list today
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