Top 50 Contractors in the UK
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London Build Expo welcomes 38,000+ leading contractors, architects, developers, housebuilders, civil engineers, local authorities, and construction professionals from across the UK.
Here’s a curated list of the top 50 construction companies in the UK, recognised for their significant contributions to the nation’s infrastructure, housing, and skyline - and many of whom you’ll meet at the show:
1. Balfour Beatty
2. Morgan Sindall Group
3. Kier Group
4. Keller Group
5. Amey UK
6. ISG
7. Tarmac Trading
8. Mace
9. M Group Services
10. Laing O’Rourke
11. Wates Group
12. J Murphy & Sons
13. Costain Group
14. Skanska UK
15. Galliford Try
16. Winvic Group
17. VINCI Construction UK
18. VolkerWessels UK
19. Willmott Dixon Holdings
20. Bowmer & Kirkland
21. John Graham Holdings
22. Sir Robert McAlpine
23. BAM Nuttall
24. Mears Group
25. BAM Construct UK
26. Equans Regeneration
27. Renew Holdings
28. JRL Group Holdings
29. McLaren Construction Group
30. Buckingham Group Contracting
31. Eurovia UK
32. Robertson Group
33. Multiplex Construction Europe
34. ESSCI
35. Lendlease Construction
36. Keltbray Group
37. NG Bailey Group
38. Ferrovial Construction
39. Severfield
40. Caddick Group
41. Bouygues (U.K.)
42. FM Conway
43. Northstone (NI)
44. McLaughlin & Harvey
45. TSL
46. Tilbury Douglas Construction
47. United Living Holdings
48. TClarke
49. Glencar Construction
50. Ardmore Construction Ltd
1. Balfour Beatty
The UK’s largest construction and infrastructure group, with annual revenues around £10 billion and over 26,000 employees. Balfour Beatty specializes in major infrastructure projects, including railways, highways, power plants, and urban regeneration schemes. Recent highlights include involvement in the HS2 high-speed rail project and Net Zero energy infrastructure initiatives. The company is known for strong financial performance, a robust order book, and a focus on sustainable construction practices.
2. Morgan Sindall Group
A leading player in construction, regeneration, and fit-out sectors, Morgan Sindall Group reported revenues of approximately £4.5 billion with steady profit growth. The company operates through several divisions, including construction, infrastructure, housing, and Overbury (fit-out specialist). Known for their expertise in regeneration projects and public-sector works, they emphasize sustainable and innovative building methods.
3. Kier Group
Kier Group is a diversified contractor focused heavily on public sector infrastructure including highways, utilities, education, and housing projects. The company has undergone restructuring but remains a significant player delivering large-scale road improvements, building refurbishments, and housing developments. Kier is recognized for partnering with government bodies and local authorities.
4. Keller Group
A global leader in geotechnical engineering and ground improvement services, Keller provides specialist foundations, earth retention, and soil stabilization for complex construction projects. Their work underpins many large infrastructure projects by ensuring stability and safety in challenging ground conditions.
5. Amey UK
Amey UK focuses on delivering public infrastructure services including highways maintenance, rail operations, waste management, and facilities services. They have strong ties with local governments and operate extensive contracts for highway management and community services, with a growing emphasis on sustainability.
6. ISG
ISG specializes in fit-out, construction, and engineering services, particularly within commercial offices, retail, leisure, and healthcare sectors. Known for rapid project delivery and refurbishment work, ISG is a major player in the UK’s urban regeneration and office modernization markets.
7. Tarmac Trading
Part of CRH plc, Tarmac Trading is the UK’s leading construction materials supplier and contractor specializing in aggregates, asphalt, and ready-mixed concrete. They provide materials for highways, commercial building foundations, and road surfacing, often working alongside contractors as a key supplier and installer.
8. Mace
Mace is a global consultancy and construction company known for iconic projects like The Shard, the London Eye, and major airport terminals. They offer a full spectrum of services from project management to construction delivery and operate across sectors including commercial, residential, infrastructure, and education.
9. M Group Services
A leading provider of utilities and infrastructure services, M Group works primarily in highways and drainage maintenance. They have longstanding contracts with UK local authorities, delivering essential repairs, highway resurfacing, and civil engineering services.
10. Laing O'Rourke
Laing O’Rourke is a privately owned engineering and construction group known for delivering technically complex and large-scale projects such as Crossrail stations and modular construction systems. Their integrated approach combines engineering, design, and construction with a strong emphasis on innovation and technology.
11. Wates Group
Family-owned for over 120 years, Wates Group focuses on construction, property development, and services across housing, education, defence, and infrastructure. The company is committed to sustainability and social value, delivering projects ranging from schools and housing developments to military facilities.
12. J Murphy & Sons
A civil engineering specialist with expertise in rail infrastructure, tunneling, energy, and marine projects. J Murphy & Sons has delivered significant projects including underground rail works, energy installations, and highway upgrades, often in challenging environments.
13. Costain Group
Costain integrates technology with construction, delivering smart infrastructure solutions for highways, water, energy, and rail sectors. They focus on innovation and digital engineering to improve project efficiency and environmental performance.
14. Skanska UK
The UK branch of Swedish multinational Skanska delivers commercial buildings, healthcare, education, and infrastructure projects. Skanska is renowned for sustainable construction practices, having delivered hospitals, schools, and office buildings across the UK.
15. Galliford Try
Galliford Try operates in building and infrastructure markets, with a strong focus on affordable housing, schools, hospitals, and highway projects. The company manages large regional contracts and is known for its quality and health & safety standards.
16. Winvic Group
Winvic is a specialist contractor with strengths in logistics, industrial, commercial, and residential sectors. They focus heavily on warehouse construction, fit-outs, and urban regeneration projects, offering both design and construction services.
17. VINCI Construction UK
Part of the global VINCI Group, this contractor delivers civil engineering, tunneling, rail, and large infrastructure projects. They are involved in major transport projects and urban development schemes, leveraging VINCI’s international expertise.
18. VolkerWessels UK
A subsidiary of Dutch construction giant VolkerWessels, this company delivers highways, rail, water, and energy infrastructure projects across the UK. They combine civil engineering expertise with sustainable construction techniques.
19. Willmott Dixon Holdings
An integrated construction and property services group, Willmott Dixon focuses on residential, education, and regeneration projects. They provide in-house design, construction, and facilities management, with a strong emphasis on social value and sustainability.
20. Bowmer & Kirkland
A mid-sized UK contractor active in commercial, education, leisure, and defence sectors. They deliver projects ranging from office buildings and leisure centres to schools and military facilities, often balancing regional and national contracts.
21. John Graham Holdings
A regional contractor with a strong presence in residential, commercial, and public-sector construction, especially across Northern England. They are known for a client-focused approach and delivery of mid-sized building projects.
22. Sir Robert McAlpine
A historic UK contractor with expertise in complex landmark projects such as the Battersea Power Station redevelopment. The company is well-known for large urban regeneration schemes and bespoke construction.
23. BAM Nuttall
Specializing in civil engineering and infrastructure, BAM Nuttall delivers projects including tunnels, railways, highways, and marine works. The company is a trusted contractor for large government and private-sector infrastructure programs.
24. Mears Group
Primarily focused on social housing and property maintenance, Mears provides housing repairs, refurbishment, and some contracting services. Their work supports vulnerable communities and local authority housing stock.
25. BAM Construct UK
The building and fit-out division of Royal BAM Group, focusing on delivering large education, healthcare, commercial, and retail projects. They are noted for efficient project management and integrated delivery.
26. Equans Regeneration
Specialist in public-sector estate regeneration, retrofit, and transformation. Equans delivers complex refurbishment and modernization projects for local authorities and housing providers.
27. Renew Holdings
Facilities management and engineering contractor with a focus on social housing and public sector estates. Their services include repairs, maintenance, and energy efficiency improvements.
28. JRL Group Holdings
A regional civils contractor operating in highways, utilities, rail, and nuclear sectors. They deliver infrastructure projects primarily across Northern England and Scotland.
29. McLaren Construction Group
Based in Eastern England, McLaren Construction specializes in commercial and education fit-out projects. They have a growing presence in the refurbishment and fit-out market.
30. Buckingham Group Contracting
A developer and contractor specializing in residential and mixed-use developments, particularly strong in the Midlands. They handle large-scale housing schemes and urban regeneration projects.
31. Eurovia UK
Part of the VINCI Group, Eurovia UK is a leading civil engineering contractor specialising in highways, earthworks, and surface engineering. They provide large-scale road construction and maintenance services and work closely with local authorities and national agencies on transport infrastructure.
32. Robertson Group
A Scotland-based construction and infrastructure company, Robertson Group delivers projects across health, education, housing, and civil engineering sectors. Known for long-term public sector frameworks, they focus on sustainability and community engagement.
33. Multiplex Construction Europe
An international contractor specialising in complex, high-end buildings such as stadiums, cultural venues, and commercial developments. Multiplex has a reputation for delivering technically challenging projects with high quality and innovation.
34. ESSCI
A mechanical, electrical, and interiors specialist delivering engineering services for commercial, education, and healthcare projects. ESSCI is known for integrated M&E solutions and high-value fit-out works.
35. Lendlease Construction
Part of the global Lendlease group, they deliver large-scale residential and mixed-use regeneration projects. Lendlease emphasizes sustainability, placemaking, and community outcomes in their developments.
36. Keltbray Group
A specialist contractor in structural engineering, demolition, civil engineering, and reinforced concrete. Keltbray is known for innovative demolition techniques and complex structural projects, often in urban environments.
37. NG Bailey Group
A leading mechanical and electrical services contractor offering design, installation, and maintenance across commercial, industrial, and infrastructure sectors. NG Bailey focuses on energy-efficient and smart-building technologies.
38. Ferrovial Construction
The UK construction arm of the Spanish multinational Ferrovial, involved in civil engineering and highways projects. They have been engaged in major transport infrastructure works, including motorway upgrades and tunnel construction.
39. Severfield
The UK’s leading structural steelwork specialist, Severfield supplies and erects steel frameworks for buildings, infrastructure, and industrial facilities. Their projects include iconic structures and complex engineered solutions.
40. Caddick Group
Yorkshire-based contractor working across residential, healthcare, education, and commercial projects. Known for quality craftsmanship and strong regional client relationships, Caddick has a solid presence in Northern England.
41. Bouygues (U.K.)
UK subsidiary of the French multinational Bouygues Construction, delivering complex infrastructure projects such as tunnelling and major transport schemes. Notable involvement in the Lower Thames Crossing project and urban regeneration.
42. FM Conway
A highways, civil engineering, and construction materials supplier focused on serving local authorities and contractors. FM Conway delivers highway maintenance, construction, and aggregates supply, emphasizing innovation and safety.
43. Northstone (NI)
Northern Ireland’s principal civil engineering and construction provider, specialising in highways, drainage, and infrastructure projects. Northstone works extensively with local authorities and government agencies.
44. McLaughlin & Harvey
Based in Northern Ireland, McLaughlin & Harvey delivers civil engineering, building, energy, and defence projects. Their portfolio ranges from commercial buildings to major infrastructure schemes across the UK and Ireland.
45. TSL Projects
A specialist contractor in utilities, rail, and highways infrastructure, operating primarily in the North West of England. TSL is recognized for utility installations, highways maintenance, and civil engineering works.
46. Tilbury Douglas Construction
A contractor delivering building and civil engineering projects focused on residential, defence, health, and education sectors. Tilbury Douglas is growing its market share through sustainable and community-focused development.
47. United Living Holdings
Focused on housing, energy, and utilities, United Living provides repairs, refurbishments, and new build projects. They emphasize social housing improvements and supporting local communities.
48. TClarke
A mechanical and electrical services contractor delivering design, installation, and maintenance for commercial, industrial, and public sector buildings. TClarke is known for engineering excellence and integrated project delivery.
49. Glencar Construction
A Northern Ireland-based contractor active in public sector and commercial building projects. Glencar delivers education, healthcare, and community facilities, with a focus on quality and local engagement.
50. Ardmore Construction Ltd
Irish-owned building contractor operating in residential, hospitality, commercial, and student accommodation sectors. Ardmore is noted for high-quality finishes and delivering complex urban regeneration schemes.
Source: The Construction Index
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